JPS63224976A - Handy printer - Google Patents

Abstract

PURPOSE:To enhance the efficiency of using the space in a handy printer to make a whole printer small, by a method wherein an image information input means is made of an adhesion-type line image sensor and used in combination with a platen as a rolling element. CONSTITUTION:A cylindrical platen 8 keeps the contact state of a thermal head 11 and a recording paper 10 in line form. In this state, the recording paper 10 is fed in a sub-scanning direction 3 to the line-type thermal head 11 due to the rotation of the platen 8. At the same time, the platen 8 is rolled as a roller, and a line image sensor 7 is allowed to travel along an original in the sub-scanning direction 3. At this time, since auxiliary rollers 14 are provided as rolling elements in addition to the platen 8, the depth of focus between the line image sensor 7 and the original is held constant due to the action of the auxiliary rollers 14, whereby the dispersion in the main-scanning direction 2 of the feed speed in the sub-scanning direction 3 is reduced. As a result, the strain of image information is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a non-day printer, and more particularly to a non-day printer having an image information input means and an image information output means.

[Conventional technology]

The conventional handy printer was published in Japanese Patent Application Laid-Open No. 58-111476.
A portable copying apparatus has already been proposed as disclosed in 2006, in which the image information input means reads the original using a CCD image sensor.

The image information output means performs thermal recording using a thermal head, and the copying device moves in the sub-scanning direction using a self-propelled drive means and rollers to enable sub-scanning of the image information input means, and the self-propelled drive The device has been miniaturized as a 111 configuration that can simultaneously feed the recording paper using the power of the device.
It made portable copying devices possible.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional technology, the space occupied by power transmission means such as multiple rollers and belts is large, and the CCD
Since the optical path length of the reduction optical system of the image sensor is long, there is a problem in that the device becomes larger.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and its purpose is to provide a compact one-day printer with a small number of parts and high space utilization efficiency.

[Means for solving problems]

The handy printer of the present invention uses a contact type line image sensor as an image information input means.

The image information output means is composed of a line-type thermal head and a cylindrical platen, and by the rolling of the platen, the non-day printer moves over the document in the sub-scanning direction of the line image sensor, and at the same time feeds the recording paper. Features.

[Effect]

According to the above configuration of the present invention, the cylindrical platen maintains a uniform contact state between the thermal head and the recording paper in a line shape, and the rotation of the platen moves the recording paper against the linear thermal head in the sub-scanning direction. Not only can you send paper to
The line image sensor can be moved in the sub-scanning direction with respect to the document by rolling the platen as a roller.

[Implementation row]

FIG. 1 is a schematic view of the main parts of a handy printer according to an embodiment of the present invention, in which a base 1 is movable in the sub-scanning direction 3 to carry a document containing image information, and the base 1 has several holes. The original is irradiated by a line light source 4 in which a LICD or the like is linearly arranged in one place in the recess, and the reflected light from the original is sent to the image sensor board 6 and to each image sensor element. A contact type line image sensor 7 that does not use a reduction optical system and is composed of an optical lens array 5 that condenses light and an image sensor board 6 that converts optical information into electrical information is disposed to input image information in the main scanning direction 2. In addition, in one place other than the plurality of holes in the base 1, a cylindrical platen 8 made of a low-elasticity material such as low-resilience rubber is installed so that a portion of the platen 8 is inserted a small amount from the base 1 toward the document side. A line-type t-t is provided that is protruding, is rotatable in the direction of the arrow 9, and is movable in the sub-scanning direction 3, and also has a plurality of heating elements in the main scanning direction 2 for recording paper lO, which is a heat-sensitive recording medium. The multi-head 11 performs printing and feeds the recording paper 10 while holding it against the platen 8. When feeding the recording paper 10, the paper feed roller 13 is pressed against the platen 8 while holding the recording paper 10 and rotates in the direction of the arrow 12. In addition, the auxiliary roller 14 is installed in other locations of the plurality of holes in the base 1 so that a portion of the auxiliary roller 14 protrudes a small amount from the base 1 toward the document side. It is arranged so that it rotates in the direction of arrow 15 to stabilize movement in the sub-scanning direction 3. The movement of the non-day printer shown in Fig. 1 in the sub-scanning direction can be achieved manually or by motor drive using the same component configuration, and the thermal recording section can be moved directly onto the thermal recording paper itself even if the thermal recording section is used to record directly on the thermal recording paper itself. It goes without saying that even if a method of thermally transferring thermofusible (or thermosublimable) ink is used, the same component configuration can be used to transfer the image information captured from the image sensor at a predetermined resolution directly to the thermal head. Even if the image information is transferred and recorded, a position detector with a predetermined resolution detects the position in the sub-scanning direction, and the image information is captured in accordance with the output of the position detector and temporarily stored in part 7A. Image information may be recorded according to the output.

FIG. 2 is a cross-sectional view of a main part of a position detecting section of a handy printer in another embodiment of the present invention, in which a rotational position detector is installed inside a platen 8 that rolls over a document 16 in the direction of an arrow 9. An encoder 17 and a transmission wheel 18 are disposed, and as the platen 8 rotates in the direction of arrow 9, the transmission wheel 18 to which power is transmitted by frictional force also rotates in the direction of arrow 19, and the encoder shaft also rotates in the direction of arrow 21. The rotational position of the platen 8 is detected by the encoder 17, and as will be described later, the time to start reading by the line sensor in the main scanning direction and the time to start recording by the thermal head are determined. Note that if the encoder 17 is placed inside the platen 8, space can be used effectively and the size can be reduced; however, if there is free space outside the platen 8 and the encoder 17 is placed outside the platen 8, Since the encoder shaft force is brought into direct contact with the outer periphery of the platen 8 and a large reduction ratio can be achieved, a low-cost encoder can be used.

FIG. 3 is a sectional view of a main part of the rotational force generating means of a handy printer in still another embodiment Ilc of the present invention, in which the platen 8 is rolled in the direction of the arrow 9 over the document 16.
A rotor magnet η that constitutes a magnetic circuit is fitted inside the platen 8, and a rotor magnet (23) radially magnetized into multiple poles is fixed inside the rotor yoke n, and the status of the coils etc. is monitored across the air gap. It will be arranged but llt
The structure is TPTA, which is known as a PM type stepping motor, or Mizuzukuri, which is known as a hybrid stepping motor.By stepping the stepping motor, position information can be obtained at each step, and the shape of the handy printer can be expanded. It has the advantage of being able to run on its own without having to do anything.

FIG. 4 is a waveform diagram illustrating the control operation of the handy printer in still another embodiment of the present invention, in which -) indicates the output signal of the position detector, a rectangular position signal 5 is output, and (b ) indicates the main scanning direction start pulse of the line image sensor, and the start pulse leakage is obtained in synchronization with the falling edge of position signal 5, and (C) indicates the image information output waveform output from the line image sensor. The scanning start time in the main scanning direction of the image information signal 4 is determined by , and the image information is read at predetermined intervals every time the handy printer moves in the sub-scanning direction.
Indicates the start pulse in the main scanning direction of the round head. At the falling edge of the position signal 5, the recording data is latched with a latch pulse 28 (synonymous with a start pulse), and the heating elements are sequentially energized to perform thermal recording. (#) indicates the T-maru head. The recording data 4 indicates the energization information (image recording information), and at the same time the previous information is latched by the latch pulse 4, the recording data 4 of the next line is transferred. Note that in Fig. 4, the start pulse is generated by focusing on the falling edge of the position signal δ, but as long as the signal is synchronized with the position signal δ, other methods of generating the signal may be used. Even when using a stepping motor, step pulses can be used as position signals.

〔Effect of the invention〕

As described above, according to the present invention, a compact image information input means is achieved using a contact-type line image sensor, and at the same time, by using the platen as a rolling element, the space utilization efficiency of the handy printer is improved, and the printer becomes portable. A compact handy printer with a wide range of ratios and a reduction in the number of parts made it possible to reduce assembly man-hours and costs, and the width of the image sensor and thermal head in the main scanning direction were made longer and wider. It is now possible to input and output image information.

Furthermore, by bringing a part of the position detector into contact with the platen, position information can be obtained at the time of inputting and outputting image information, accurate image information can be obtained, and distortions and uneven shading of the image information can be eliminated. Furthermore, by disposing a rolling auxiliary roller in addition to the platen, the depth of focus between the image sensor and the document is kept constant, and variations in the main scanning direction of the sub-scanning direction feeding device are reduced, and image information is This eliminates distortion and does not cause damage such as wrinkles to the original. Furthermore, by generating the main scanning direction start pulse of the line image sensor in synchronization with the output signal of the position detector, the image of the original can be improved. Information is input accurately at a predetermined resolution, and unevenness in image information is reduced. Furthermore, by generating the start pulse in the main scanning direction of the thermal head in synchronization with the output signal of the position detector, the position of the thermal recording dot is determined according to the position signal, thereby eliminating uneven printing. Furthermore, by having a co-worker generate the main scanning direction start pulse of the T-maru head and the main scanning direction start pulse of the line image sensor in synchronization with the output signal of the position detector, a compact and portable copying device with high copy quality can be achieved. was gotten. Furthermore, by arranging a stepping motor inside the platen, it is not only possible to run on its own.

A small self-propelled handy printer that can obtain a rotational position signal of the platen using the stepping motor pivot pulse and has a two-position detection function was obtained.

As described above, the present invention has excellent effects and is useful not only for office automation but also for reading and recording image information in the field of home automation, and can be used as an image input/output device for computers, fax machines, etc. can also be applied.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of the main parts of an embodiment of the handy printer of the present invention. FIG. 2 is a sectional view of a main part of a position detection section in another embodiment of the handy printer of the present invention. FIG. 3 is a sectional view of a main part of the rotational force generating means in still another embodiment of the handy printer of the present invention. FIG. 4 is a waveform diagram illustrating control operations in still another embodiment of the handy printer of the present invention. 2... Main scanning direction 3... Sub-scanning direction 71, line image sensor 81, platen 10... Recording paper applicant Seiko Epson Corporation Fig. 1

Claims (7)

[Claims] (1) In a handy printer having an image information input means and an image information output means, the image information input means is composed of a contact type line image sensor,
The image information output means is composed of a line-type thermal head and a cylindrical platen, and the rotation of the platen causes the handy printer to move over the document in the sub-scanning direction of the line image sensor, and at the same time feeds the recording paper. A handy printer that features: (2) The handy printer according to claim 1, wherein a part of the rotational position detector is brought into contact with a part of the platen. (3) The handy printer according to claim 1, further comprising a rolling auxiliary roller other than the platen. (4) The handy printer according to claim 2, wherein the main scanning direction start pulse of the line image sensor is generated in synchronization with the output signal of the rotational position detector. (5) The handy printer according to claim 2, wherein the start pulse in the main scanning direction of the thermal head is generated in synchronization with the output signal of the rotational position detector. (6) The handy printer according to claim 4, wherein the start pulse in the main scanning direction of the thermal head is generated in synchronization with the output signal of the rotational position detector. (7) The handy printer according to claim 1, characterized in that a rotational force generating means is disposed inside the platen.