JPH0531894A - Ink jet device and electronic typewriter provided with the same ink jet device - Google Patents

Abstract

PURPOSE:To prevent the contact of a recording means with a recording medium resulting in damaging the recording means. CONSTITUTION:In a line recording mode, a delivery port of a recording means is retracted to be out of a recording medium feed path at every completion of one line recording. In a page recording mode, the recording means is reciprocated within the recording medium feed path for making recording in a predetermined area; after the completion of the recording in the predetermined area, the delivery port of the recording means is retracted to be out of the recording medium feed path; and a recording medium is fed to be discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device used for recording characters and images and an electronic typewriter having the recording device.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
A recording device mounted on an electronic typewriter or a word processor for recording on a recording medium such as paper or OHP sheet (hereinafter also referred to as recording paper or simply paper) is
It has been proposed in the form of mounting recording heads of various recording systems. The recording head includes a wire dot system, a thermal system, a thermal transfer system, an inkjet system, and the like.

In particular, since the ink jet system is one in which ink is directly ejected onto a recording paper, it is attracting attention as a quiet recording system with low running cost.

By the way, for example, in an electronic typewriter equipped with a recording apparatus having such an ink jet recording head, recording paper of a predetermined size is fed to a recording position,
Predetermined recording is performed by bidirectionally scanning the recording head while conveying the recording sheet according to the recording signal. Then, when the recording on the recording sheet is completed, the recording sheet is discharged, the next recording sheet is fed to the recording position, and the recording is continued. In this case, there is a possibility that the trailing edge portion of the sheet that has passed between the pinch rollers when the recording sheet is ejected may come into contact with the ink ejection port of the inkjet recording head, resulting in defective conveyance of the recording sheet or damage to the head ejection port surface. there were.

As a technique for improving this problem, for example, a suction means is provided in a recording area where recording is performed in the conveying path of the recording paper, particularly facing the recording head, and the recording paper is sucked and conveyed so that the rear end of the recording paper is moved. There has been proposed a structure that does not contact the head.

Further, when recording is performed on the entire recording area of the recording sheet, recording is performed with the trailing edge of the recording sheet being pressed at the time of recording the final line. Then, at the time when the recording of the final line is completed, the recording head moved to the non-recording area out of the recording area is located on the non-recording area or on the opposite side of the non-recording area so as not to reduce the throughput.
It is returned to an area called a home position of a non-recording area where a head cap member, a head cleaning member and the like are arranged, which is out of the recording area. It has been proposed to eject the recording paper at the same time when the recording head returns.

By the way, when the recording head is returned at high speed at the end of recording and the recording paper is ejected at the same time, when the recording head performs recording over the entire maximum recording width of the recording paper, the head is in an area opposite to the home position. If it is present, the operation of returning the head at high speed and the ejection of the recording paper may be performed at the same time. In this case, if the recording sheet is jammed, there is a risk that the ejection port surface of the recording head may contact the jammed recording sheet and the ejection port surface may be damaged.

An object of the present invention is to provide a recording device capable of excellent bidirectional recording and an electronic typewriter provided with the recording device.

Another object of the present invention is to provide a recording apparatus capable of favorably ejecting a recording medium and an electronic typewriter provided with the recording apparatus.

Another object of the present invention is to provide a recording device in which the recording medium and the recording head do not come into contact with each other when the recording medium is ejected, and an electronic typewriter provided with the recording device.

Another object of the present invention is to provide a recording apparatus capable of further shortening the recording time by devising the reciprocating range of the recording head during recording, and an electronic typewriter provided with the recording apparatus. is there.

The present invention has been proposed in order to improve the above-mentioned problems, and is capable of bidirectional printing and is compact, and the rear end of the recording medium and the recording head when the recording medium is discharged. SUMMARY OF THE INVENTION It is an object of the present invention to provide a recording device capable of satisfactorily preventing various technical problems due to the contact of the device with a simple configuration and an electronic typewriter equipped with the recording device.

[0013]

A typical means for solving the above problems according to the present invention is an ink jet apparatus for ejecting ink to perform recording on a recording medium, in which ink is ejected from an ejection port to perform recording. A discriminating mode for discriminating between a recording means for recording on a medium and a line recording mode in which recording is performed line by line by the recording means, or a page recording mode in which recording is performed for a plurality of lines; When the determination result is the line recording mode, the ejection port of the recording unit is evacuated to the outside of the conveyance path of the recording medium every time the recording of one line is completed, and the determination result of the determination mode is the page recording mode. In some cases,
The recording means is reciprocated within the conveyance path of the recording medium to perform recording in a predetermined area, and the ejection port of the recording means is retracted out of the conveyance path of the recording medium after the recording in the predetermined area is completed. And executing means for carrying the recording medium to eject the recording medium. It is characterized by

[0014]

According to the present invention, the recording medium can be conveyed without contact with the recording means.

[0015]

【Example】

[Embodiment 1] In the embodiment described below, the recording head performs the recording after the trailing edge detecting means for detecting the passage of the trailing edge of the recording medium detects that the trailing edge of the recording medium has passed. It is determined whether or not the recording head is present in a recording area facing the medium, and if the recording head is present in the recording area, the carriage on which the head is mounted is driven to cause the recording head to perform the recording. After moving to the area outside the area (area outside the transport path of the recording medium),
It is characterized in that the recording medium is controlled so as to be conveyed.

Further, in the embodiments described below, the right end portion of the recording medium is defined as an area facing the recording medium as the return area of the carriage, and the recording medium is detected by the trailing edge detecting means of the recording medium. When the trailing edge of the trailing edge is detected, the recording head is moved to a region facing the cap member provided in the non-recording region.

Further, the embodiment described below is an electronic typewriter equipped with a recording device, and has a line recording mode capable of forming an image for each line and a digit capable of forming an image for several lines at a time. A feed recording mode, a trailing edge detection cancel mode in which a detection unit for detecting the trailing edge portion of the recording medium does not function in response to execution of the line recording mode, and the digit feed recording mode. And a trailing edge detection mode in which a detection unit that detects the trailing edge portion of the recording medium is caused to function.

With the above-mentioned structure, the return timing of the recording head and the ejection timing of the recording medium are adjusted, and the contact between the head ejection port surface and the rear end portion of the recording medium is surely prevented. Moreover, since there is no need for a space for the recording head to escape from the recording medium on the side opposite to the home position across the recording area of the recording apparatus, there is an advantage that the recording apparatus can be downsized.

[Embodiment 2] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

(Overall Description) First, an overall description of an electronic typewriter to which an embodiment of the present invention is applied will be given.

FIG. 1 and FIG. 2 show the outline of the external structure of an electronic typewriter which is a recording apparatus to which the present invention can be applied. Here, reference numeral 1 denotes a keyboard unit, which is a key for inputting characters such as characters and numbers, a print command key such as a return key, a key group 2 such as various control keys, and a line recording mode and a page recording mode described later. A switching key 81 for switching the above is arranged. When not in use, the hinge 3 is rotated to fold it to the display 6 side as shown in FIG. Reference numeral 4 denotes a feeding tray for placing a sheet-shaped recording medium for feeding to the recording device section of the electronic typewriter. When not in use, the feeding tray 4 is also housed so as to cover the upper side of the recording device section as shown in FIG. Reference numeral 5 denotes a feed knob for manually setting or ejecting the recording medium to the recording position. The operator manually rotates the recording medium clockwise or counterclockwise to eject or eject the recording medium. Transport in the direction. 6 is a key operation or a floppy disk 1A
A display for displaying a sentence or the like input from the device 7 is a handle used when the typewriter according to the present embodiment is carried.

FIG. 3 is a schematic perspective view showing the recording device section of the typewriter.

Reference numeral 9 is a head cartridge which integrally comprises an ink jet recording head and an ink tank for storing ink to be supplied to the head, which is detachably mounted in a carriage 11. And carriage 1
1 is mounted with the head cartridge 9 and scans in the S direction in the drawing (moves back and forth along the conveyance path of the recording medium). Here, the ink jet recording head used in the present embodiment uses thermal energy to eject ink from an ejection port (not shown), and is of a type including an electrothermal conversion element that generates thermal energy. .
Therefore, this recording head drives the electrothermal conversion element in response to a recording signal (heats it) to cause film boiling in the ink, and uses the pressure change generated by the generation of bubbles at that time to eject the ink. Discharge from. 13 is a hook for attaching the head cartridge 9 to the carriage 11, 1
Reference numeral 5 is a lever for operating the hook 13. A marker 17 is provided on the lever 15 for indicating a scale provided on a cover, which will be described later, so that the print position and the set position by the recording head of the head cartridge 9 can be read.
Is provided. Reference numeral 19 is a support plate that supports an electrical connection portion (not shown) for the head cartridge 9. Two
Reference numeral 1 is a flexible cable for connecting the electric connection part and the main body control part.

Reference numeral 23 is a guide shaft for guiding the carriage 11 in the S direction, and is inserted into a bearing 25 of the carriage 11. Reference numeral 27 is a timing belt to which the carriage 11 is fixed and which transmits power for moving the carriage 11 in the S direction, and pulleys 29 arranged on both sides of the device.
It is stretched over A and 29B. The driving force is transmitted from the carriage motor 31 to one pulley 29B via a transmission mechanism such as a gear.

Reference numeral 71 is a carriage home sensor using a photo interrupter, and a protrusion (not shown) provided on the bottom surface of the carriage 11 passes through the carriage home sensor 71 to cause the carriage 11 to move.
Set the positioning reference of.

Reference numeral 33 denotes a conveyance roller that regulates a recording surface of a recording medium such as paper (hereinafter also referred to as recording paper) and conveys the recording surface at the time of recording.
Driven by. 37 is a paper pan for guiding the recording medium from the side of the feeding tray 4 to the recording position. A detection sensor 40 detects the rear end of the recording medium. Then, the CPU 100, which will be described later, recognizes that the recording medium will come off the holding plate 45, which will be described later, n steps after the sensor 40 detects the rear end of the recording medium. That is, the sensor 40 determines the area where the recording medium is detached from the pressing plate 45, and recognizes the final recording line by the recording head.
Reference numeral 39 denotes a feed roller which is disposed in the middle of the recording medium conveyance path and presses the recording medium toward the conveyance roller 33 and conveys it. Reference numeral 34 denotes a platen that faces the ejection port forming surface of the head cartridge 9 and regulates the recording surface of the recording medium. Reference numeral 41 denotes a discharge roller which is arranged on the downstream side of the recording position in the recording medium conveyance direction and discharges the recording medium toward a discharge port shown in the drawing. Reference numeral 42 denotes a spur provided corresponding to the discharge roller 41, which presses the roller 41 via the recording medium and causes the discharge roller 41 to convey the recording medium. Reference numeral 43 denotes a release lever for releasing the respective biases of the feed roller 39, the pressing plate 45, and the spur 42 when setting the recording medium, which can be operated by the operator.

Reference numeral 45 is a holding plate for suppressing the floating of the recording medium in the vicinity of the recording position and for ensuring a close contact with the conveying roller 33. In this embodiment, an ink jet recording head that performs recording by ejecting ink is used as the recording head. Therefore, the distance between the ink ejection port forming surface of the recording head and the recording surface of the recording medium is relatively small, and the distance between the recording medium and the head ejection port forming surface must be strictly controlled in order to avoid contact with the recording medium. Therefore, it is effective to press the recording medium against the conveying roller 33 by the pressing plate 45. Reference numeral 47 is a scale provided on the pressing plate 45, and 49 is a marker provided on the carriage 11 corresponding to the scale, by which the print position setting position of the recording head can be read.

Reference numeral 51 denotes a cap which is installed at the home position and which is made of an elastic material such as rubber and faces the ink ejection port forming surface of the recording head.
It is supported so that it can be released. The cap 51 is used for protection of the recording head during non-recording, and for ejection recovery processing of the recording head. Note that the ejection recovery process here means that ink is ejected from all ejection ports by driving an energy generating element that is provided inside the ink ejection port and generates energy used for ejecting ink, which is described separately from the recording operation. This is a process of forcibly discharging and removing the cause of ejection failure.

Reference numeral 53 is a pump used to generate a suction force for forcibly discharging the ink and for sucking the ink received by the cap 51 in the discharge recovery process by the forcible ink discharge. 55 is a waste ink tank for storing the waste ink sucked by the pump 53, and 57 is a tube for connecting the pump 53 and the waste ink tank 55.

Reference numeral 59 is a blade for wiping the ejection port forming surface of the recording head. The blade 59 is movably supported at a position where it projects toward the recording head and wipes in the process of head movement, and a retracted position where it does not engage with the ejection port forming surface. 61 is a motor, 63
Is a cam device for receiving power transmitted from the motor 61 to drive the pump 53 and move the cap 51 and the blade 59, respectively.

(Control Means) FIG. 4 shows a schematic configuration example of a control block of the electronic typewriter according to one embodiment of the present invention.

Here, 100 is, for example, a CPU in the form of a microcomputer, which controls each unit according to a processing procedure described later in FIG. Reference numeral 101 denotes a timer provided in the CPU 100, which is used for measuring the time without key input, controlling the printer, and the like.

Reference numeral 102 denotes a ROM, which stores fixed data such as a character generator in addition to a program corresponding to the processing procedure executed by the CPU 100. 104 is RA
M is an area for developing and managing data related to printing, and an area for working the CPU 100. 1
Reference numeral 06 is a recording apparatus equipped with the inkjet recording head described in FIG. The detection sensor 4 described above
0 and the carriage home sensor 71 are both the CP
Input a detection signal to U100.

Therefore, in the present embodiment, the recording head 9
Drive the carriage equipped with the
It is controlled by the PU 100.

A control example of this embodiment will be shown below.

First, recording is started. The recording paper is supplied from the feeding side and is conveyed by the conveying roller 33 to the recording area where the recording is performed while facing the recording head. On the other hand, the recording head waits for the supply of the recording paper and ejects ink from the ejection port in association with the scanning of the carriage 11 at a predetermined timing according to a predetermined recording signal to perform desired recording. Then, when the recording paper is sequentially conveyed and recorded, the recording paper end detection sensor 40 provided in the recording paper conveyance path detects the end of the recording paper. When the end of the recording paper is detected, the step motor 31 that scans the carriage 11 detects the step number. When the carriage 11 is present in the recording area facing the recording sheet based on the detection result, the CPU 100 issues a command to the carriage motor 31 which is the drive source of the carriage 11 to cause the carriage 11 to include the cap member 51 and the like. Move to the home position side. The recording head 9 is constructed so as not to move to the right end of the maximum recording width of the recording paper on the side opposite to the home position, as will be described later. Then, after recognizing that the carriage 11 has moved to the home position side, a command for ejecting the recording paper is issued to eject the recording paper. By performing such control, the head 9 is completely prevented from coming into contact with the trailing edge of the recording paper. Therefore, it is possible to prevent the recording paper from being contaminated and the ink ejection surface of the head 9 from being damaged.

The flow chart shown in FIG. 5 briefly shows this control. That is, START is set when the drive command of the carry motor 35 is received. First, step S1
Then, it is determined whether or not the rotation of the carry motor 35 moves from less than n steps to more than n steps.

If the movement is from less than n steps to more than n steps, the process proceeds to step S2 and the recording head 9
It is determined whether or not is inside the recording medium. Therefore, when the recording head 9 is inside the recording medium, the process proceeds to step S3, and the carriage motor 31 is driven to move the carriage 11 so that the recording head 9 is located outside the recording area facing the recording medium. After the movement is completed, the process proceeds to step S4, and the carry motor 35 is driven. In this case, the recording medium is automatically ejected thereafter (step S5).

If the recording head is located outside the recording medium in step S2, the process directly proceeds to step S4 to drive the conveyance motor 35, and then the recording medium is automatically ejected (step S5).

In step S1, when the rotation of the carry motor 35 does not move from less than n steps to more than n steps, the process proceeds to step S5 to drive the carry motor 35 to carry the recording medium.

Here, the above control example will be described in more detail below with reference to FIG.

First, the recording paper is supplied from the paper feed side. The recording paper is conveyed by the conveyance roller 33 to the recording area where the recording is performed while facing the recording head.

Next, recording is performed by the recording head described above. In this embodiment, a line recording mode is provided as a function peculiar to the electronic typewriter in addition to the shift feed recording mode (page recording mode). Therefore, an example of control in each of the line recording mode and the page recording mode will be shown.

First, the line recording mode will be described. Line recording mode is instructed by keyboard input,
That is, this is a mode in which recording is performed line by line when the switching key 81 is turned on. Therefore, in this line recording mode, recording is executed when a paper feed command is received, for example, when a line feed command is received. This line recording mode will be described in detail with reference to the flowchart of FIG.

In step S1, it is determined that the line recording mode is set, and the process advances to the line recording mode control. Next, in step S2, it is determined whether or not it is a sheet discharge command. If it is a sheet discharge command, the process proceeds to step S26, and the sheet is discharged after the cap operation is completed (steps S27, S28, S29). When the result is NO in step S2, the process proceeds to step S3, and it is determined whether or not it is a print command. If it is a print command, the process proceeds to step S4, and it is determined whether or not it is a print prohibited area. If it is the print prohibited area, the process proceeds to step S9. If it is not the print prohibited area, printing is executed (step S5), and the process proceeds to step S6. If the result is NO in step S3, the process directly proceeds to step S6. In step S6, it is determined whether or not it is a paper feed command, and if not, the process returns to step S2. If it is a paper feed command, paper feed is executed (step S7), and then the process proceeds to step S8. In step S8, it is determined whether or not the recording head is capped 51. If capped, the process returns to step S2. If the cap 51 is not attached,
The carriage 11 is retracted to the escape position (step S9). The escape position may be provided outside the conveyance path of the recording medium and may be a position where the cap operation is performed. When the movement to the escape position is completed, the timer 101 is set to T = 0 and the activation is started (step S
10, S11), and then proceeds to step S12. In step S12, it is determined whether or not there is a key input. If there is a key input, the process returns to step S2. If there is no key input, the timer 101 is read (step S1).
3) After that, it progresses to step S14. And step S
At 14, it is determined whether T> 5 seconds. If not, the process returns to step S12. When T> 5 seconds, the cap operation is completed (steps S15 and S16), and the timer 10
1 is stopped (step S17), and then step S
Return to 2.

Next, the control method in the page recording mode will be described. If the result is NO in step S1, the process proceeds to page recording mode. If it is a print command in step S18, the process proceeds to step S19, and it is determined whether or not it is a print prohibited area. If not, printing is executed (step S2
0), the paper is further fed (step S21), and the process returns to step S11. When the printing is repeated here, the carriage 11 repeats the reciprocating movement from the home position for recording in the conveyance path of the recording paper as a base point. If it is the print prohibited area in step S19, step S2
The process proceeds to step 2, and after the cap operation is completed, the sheet is discharged and the series of operations is completed (steps S23, S24, S25).

By using the above control method, the recording head is prevented from contacting the trailing edge of the recording paper regardless of the line recording mode or the page recording mode, and the recording paper is contaminated or the head is contaminated. It is possible to prevent damage to the ink ejection surface of the device.

Further, this embodiment will be described. FIG. 7 is a partial external view of the electronic typewriter according to the present invention, and a supplement of the description made with reference to FIG. 1 will be given with reference to FIG.

Reference numeral 16 is a scale corresponding to the above-mentioned marker 17, and is for making it possible to read the print position and the set position by the recording head of the head cartridge 9.

FIG. 8 is a schematic explanatory view of the electronic typewriter of this embodiment as seen from above.

W ₁ represents the insertable range of the recording medium,
W ₂ indicates the maximum print width.

X ₁ indicates the position of the home position and also serves as the position where capping is performed.

X ₂ indicates the printable leftmost position, and X ₃ indicates the rightmost position.

D indicates the distance between the marker 17 and the ink ejection port of the recording head.

As described above, in this embodiment, the recording head unit 9 is configured to be movable up to the right end portion X ₃ of the maximum recording width of the recording paper. Since this position is defined as the rightmost end of the return area of the head 9, the side area head 9 is prevented from moving.
Therefore, only the ink tank portion of the head cartridge 9 is present in the side surface region, and the length of the recording sheet in the recording device in the width direction can be shortened.

By the way, various recording modes are set in the CPU 100, and the following control can be performed depending on the set mode.

In the electronic typewriter of the present embodiment, as described above, the line recording mode in which recording is performed line by line and the shift recording mode (also referred to as page recording mode) in which a plurality of lines up to a predetermined area are recorded at one time. And can be set.

In the line recording mode, the recording head is returned to the home position every time one line is recorded, and then the recording paper is conveyed. With such a configuration, the recording head and the trailing edge of the recording sheet do not come into contact with each other even if the sensor does not detect the trailing edge of the recording sheet. On the other hand, in the case of shift feed recording (page recording), recording may be performed over the next recording sheet near the trailing edge of the recording sheet. In such recording, it is necessary to detect the trailing edge of the recording paper with a sensor and perform the control as described above.

That is, it is determined whether the recording head 9 is a line recording mode in which recording is performed line by line or a column feed recording mode (line recording mode) in which recording is performed over a plurality of lines (in the present embodiment, the switching key 81 is used).
It is determined by ON / OFF of). Then, in the line recording mode in which the switching key 81 is ON, the ejection port of the recording head 9 is retracted out of the conveyance path of the recording paper each time recording of one line is completed. On the other hand, when the switching key 81 is in the OFF-position shift recording mode (page recording mode), the recording head 9 is moved in the conveyance path of the recording paper in order to record a plurality of predetermined areas.
The recording sheet is ejected and conveyed after the ejection port of the recording head 9 is retreated to the outside of the recording sheet conveyance path after the recording of the last line of the predetermined area is completed.

As described above, since the electronic typewriter described in this embodiment has various recording modes, appropriate scanning of the recording head and recording sheet conveyance control corresponding to the recording modes must be performed. I have to. That is, even if the sensor that always detects the trailing edge of the recording paper is functioning, it may not be necessary depending on the recording mode. Therefore, for example, when the line recording mode is selected, the trailing edge detection cancel mode in which the trailing edge of the recording sheet is not detected is selected, and when the shift feed recording mode (page recording mode) is selected, the trailing edge of the recording sheet is detected. The trailing edge detection mode to be performed can be controlled to be selected.

Of course, various combinations of the recording mode and modes for selecting whether or not to detect the trailing edge can be made within the range where the technical idea of the present invention is achieved, if necessary.

In this way, by detecting the trailing edge of the recording paper and controlling the scanning of the recording head in connection with it, the conventional problems can be solved.

(Others) The present invention is particularly effective in the ink jet recording type recording head and recording apparatus for recording by forming flying droplets by utilizing thermal energy among the ink jet recording methods. is there. This is because such a system can achieve high density recording and high definition recording.

Regarding its typical structure and principle, see, for example, US Pat. Nos. 4,723,129 and 47407.
What is done using the basic principles disclosed in the '96 patent is preferred. This method can be applied to both so-called on-demand type and continuous type,
Particularly in the case of the on-demand type, the electrothermal converter arranged corresponding to the sheet or the liquid path holding the recording liquid (ink) corresponds to the recording information, and the recording liquid exceeds nucleate boiling. By applying at least one drive signal that causes a rapid temperature rise, thermal energy is generated in the electrothermal converter, causing the recording liquid near the heat-acting surface of the recording head to film-boil, resulting in this drive. This is effective because bubbles can be formed in the recording liquid in a one-to-one correspondence with signals. The recording liquid is discharged into the atmosphere through the discharge port by the action force generated in the growth and contraction process of the bubbles, and at least 1
Forming two drops. It is more preferable to make this drive signal in a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the recording liquid with excellent responsiveness can be achieved.
This pulse-shaped drive signal is described in US Pat. No. 443.
Those described in Japanese Patent Nos. 359 and 4345262 are suitable. It should be noted that US Pat. No. 4,313,124, which discloses an invention relating to the rate of temperature rise of the heat acting surface
If the conditions described in the specification are adopted, more excellent recording can be performed.

As the constitution of the recording head, other than the combination constitution of the ejection port, the liquid passage, and the electrothermal converter (the straight liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications. U.S. Pat. No. 4,558,333 and U.S. Pat. No. 4, which disclose a configuration in which a heat acting portion is arranged in a bending region.
A configuration using the specification of No. 459600 is also included in the present invention.

In addition, as the serial type recording head as described above, a replaceable chip that can be electrically connected to the apparatus main body and can supply ink from the apparatus main body by being attached to the apparatus main body. The present invention is effective in any case such as the case where a recording head of a type or a recording head of a cartridge type in which an ink tank is integrally provided in the recording head itself described in the above embodiment is used.

Regarding the type or number of recording heads to be mounted, for example, only one is provided corresponding to a single color ink, or plural types corresponding to a plurality of inks having different recording colors and densities. It may be provided individually.

As described above, according to the present embodiment, the recording head is detected when the recording medium trailing edge detecting means deviates the recording medium from the recording medium holding member and the recording medium comes into contact with the recording head when the conveying means is driven. It is determined whether or not the recording head is inside the recording medium, and only when it is recognized that the recording head is inside, the recording head is moved to the outside of the recording medium on the left side, for example, and then the recording medium is conveyed. It is possible to prevent contact between the ejection port surface and the rear end of the recording medium.

Moreover, with the above-mentioned configuration, there is an advantage that the recording device can be downsized without requiring a space for the recording head to escape from the recording medium on the right side of the recording device.

Further, since the rear end detection of the recording medium is selected according to the recording mode, the control relating to recording can be simplified.

[0071]

As described above, according to the present invention, there is provided a recording apparatus capable of preventing the recording means and the recording medium from inadvertently contacting each other and improving the recording speed, and the recording apparatus. An electronic typewriter can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a usage state of an electronic typewriter to which an embodiment of the present invention is applied.

FIG. 2 is a perspective view showing a housed state of an electronic typewriter to which an embodiment of the present invention is applied.

FIG. 3 is a perspective view of an embodiment of a recording apparatus to which the present invention can be applied.

FIG. 4 is a block diagram of an electronic typewriter to which an embodiment of the present invention is applied.

FIG. 5 is a flowchart showing an example of a control procedure of an electronic typewriter to which an embodiment of the present invention is applied.

FIG. 6 is a flowchart showing an example of a control procedure of the electronic typewriter to which the embodiment of the present invention is applied.

FIG. 7 is a partial external view of an electronic typewriter to which an embodiment of the present invention is applied.

FIG. 8 is a schematic explanatory diagram seen from above of an electronic typewriter to which an embodiment of the present invention is applied.

[Explanation of symbols] 1 keyboard 6 Display 9 head cartridge 11 carriage 16 scale 17 markers 31 Carriage motor 33 transport rollers 35 Conveyor motor 40 detection sensor 45 Presser plate 47 scale 49 Marker 51 cap 100 CPU 102 ROM 104 RAM 106 printer

Claims (24)

[Claims] 1. An ink jet device for ejecting ink to perform recording on a recording medium, comprising: recording means for ejecting ink from an ejection port to perform recording on a recording medium; and line by line by the recording means. A discriminating mode for discriminating between a line recording mode for recording and a page recording mode for recording over a plurality of lines, and when the discrimination result of the discrimination mode is the line recording mode, each time one line is recorded. When the ejection port of the recording unit is retreated to the outside of the conveyance path of the recording medium and the determination result of the determination mode is the page recording mode, the conveyance path of the recording medium is used to perform recording in a predetermined area. The reciprocating movement of the recording means is performed inside the recording medium, and after the recording of the predetermined area is completed, the ejection port of the recording means is evacuated to the outside of the conveyance path of the recording medium. An inkjet device, comprising: an executing unit configured to carry out a recording medium for discharging. 2. The inkjet device according to claim 1, wherein the determination mode is determined by the CPU by a key operation by an operator. 3. In the page recording mode,
When the reciprocating movement of the recording means is performed in the conveyance path of the recording medium to perform recording in a predetermined area, the carriage provided with the recording means sets the home position for recording in the conveyance path of the recording medium. The inkjet device according to claim 1, wherein the reciprocating movement is repeated as a base point. 4. The inkjet according to claim 1, further comprising a trailing edge detection sensor that detects a trailing edge of the recording medium, and the trailing edge detection sensor operates in the page recording mode. apparatus. 5. A carriage home sensor for recognizing the position of a carriage carrying the recording means is provided, and the CPU recognizes the position of the carriage by the number of steps of the motor after the detection of the carriage home sensor. The inkjet device according to claim 1, wherein: 6. An ink jet recording method for recording on a recording medium by using a recording means for recording ink on a recording medium by ejecting ink from an ejection port, wherein line recording is performed for each line by the recording means. In the line recording mode, the ejection port of the recording unit is moved outside the conveyance path of the recording medium after recognizing the mode or the page recording mode in which recording is performed over a plurality of lines. In the page recording mode, the recording means is reciprocated within the conveyance path of the recording medium in order to perform recording in a predetermined area, and after the recording in the predetermined area is completed, An ink jet recording method, characterized in that the ejection port is retracted to the outside of the conveyance path of the recording medium, and then the recording medium is conveyed for ejection. 7. The inkjet apparatus according to claim 1, wherein the recording unit includes an inkjet recording head that ejects ink by using thermal energy. 8. The inkjet recording method according to claim 6, wherein the recording unit includes an inkjet recording head that ejects ink by using thermal energy. 9. The ink jet recording head according to claim 1, wherein the recording unit has a film boiling caused by thermal energy, and ejects ink from an ejection port due to growth of bubbles due to the film boiling. Inkjet device. 10. The ink jet recording head according to claim 6, wherein the recording unit has a film boiling caused by thermal energy and ejects ink from an ejection port due to growth of bubbles due to the film boiling. Inkjet recording method. 11. An electronic typewriter for recording on a recording medium, a key input means for inputting information, a recording means for ejecting an ink jet from an ejection port to perform recording on the recording medium, The line recording mode in which recording is performed line by line by the means or the page recording mode in which recording is performed over a plurality of lines; and when the determination result of the determination mode is the line recording mode, 1 In order to perform recording in a predetermined area when the result of the determination in the determination mode is the page recording mode by retracting the ejection port of the recording unit to the outside of the conveyance path of the recording medium each time the line recording is completed. The reciprocating movement of the recording means is performed within the conveyance path of the recording medium, and after the recording of the predetermined area is completed, the ejection port of the recording means is conveyed to the recording medium. Electronic typewriter, characterized in that it has a, and execution means for transporting for discharging the recording medium after backing to the path outside. 12. The electronic typewriter according to claim 11, wherein a floppy disk can be attached to the electronic typewriter. 13. The electronic typewriter according to claim 11, wherein the electronic typewriter includes a display for displaying information input by the key input means. 14. A recording head for performing recording on a recording medium using ink, a carriage on which the recording head is mounted, a conveying unit for conveying the recording medium, and the carriage on which the recording head is mounted. Drive means for achieving desired recording by relatively moving the conveying means and the conveying means, detecting means for detecting the trailing end portion of the recording medium, input means for inputting image information to be recorded, input An electronic typewriter having a display means for visually recognizing the recorded information, the typewriter being capable of recording an image line by line and a line recording mode capable of forming images for several lines at a time. The trailing edge detection cancel mode that does not function the detection means for detecting the trailing edge portion of the recording medium corresponding to the execution of the line recording mode. When an electronic typewriter, characterized in that a, a trailing edge detection mode to function detecting means for detecting the trailing end portion of the recording medium in response to executing the shift recording mode. 15. The recording means is mounted on a carriage, and the carriage is a right end portion of the recording medium, and an area facing the recording medium is a return area. The described inkjet device. 16. The recording means is mounted on a carriage, wherein the carriage is a right end portion of the recording medium, and an area facing the recording medium is a return area. Inkjet recording method described. 17. The recording means is mounted on a carriage, and the carriage is a right end portion of the recording medium, and an area facing the recording medium is a return area. Electronic typewriter listed. 18. The recording means is mounted on a carriage, and the carriage is a right end portion of the recording medium, and an area facing the recording medium is a return area. Electronic typewriter listed. 19. The recording unit according to claim 1, wherein the recording unit has a recording head and an ink tank for storing ink to be supplied to the head, which are integrated with each other, and has a detachable head cartridge in an apparatus main body. The described inkjet device. 20. The recording means according to claim 6, wherein the recording head and the ink tank for storing ink to be supplied to the head are integrated, and the recording means has a detachable head cartridge. Inkjet recording method described. 21. The recording means according to claim 11, wherein the recording head and the ink tank for storing ink to be supplied to the head are integrated, and the recording means has a detachable head cartridge. Electronic typewriter listed. 22. The recording means according to claim 14, wherein the recording head and an ink tank for storing ink to be supplied to the head are integrated, and the recording means has a detachable head cartridge. Electronic typewriter listed. 23. The electronic typewriter according to claim 11, wherein the recording unit has an inkjet recording head that ejects ink by using thermal energy. 24. The ink jet recording head according to claim 11, wherein the recording means includes an ink jet recording head that causes film boiling by thermal energy and discharges ink from a growth of bubbles due to the film boiling. Item 15. The electronic typewriter according to item 14.