JPS61291147A - Recording apparatus - Google Patents

Abstract

PURPOSE:To enable high-speed recording without generating clogging, by providing a recording medium transfer mechanism having first and second recording medium modes for setting a recording medium to the same and reverse directions with respect to the moving direction of a material to be recorded. CONSTITUTION:A film 2 moves upwardly and downwardly in accordance with a clockwise rotation and counterclockwise rotation when looked from the side of the gear 58 of a film driving motor 52. One end of the anticlockwise spring 84 of a drive shaft 87 is engaged with the recessed part of a gear 78 and the rotation in the clockwise direction is transmitted to the drive shaft 87 for moving the film 2. At this time, a gear 59 rotates to the clockwise direction but slip is generated between a drive shaft 88 and a clockwise spring 83. A film transfer mechanism 143 having first and second feed modes for transferring the film to the same and reverse directions with respect to the moving direction of a material to be recorded is provided and even the film 2 taking no endless form is continuously fed to a heating element so as to allow the large-number-of-perforation part 92 of the film filled with recording ink to reach the surface of said heating element 3 to make it possible to increase a recording speed. If the change-over of the first and second feed modes is performed within a definite time, recording by the used large-number-of-perforation part 92 is not performed and, therefore, recording with the same density can be always performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a novel Infusiera 1-type recording device that can be applied to, for example, printers, facsimile machines, and the like.

[Technical disadvantages of the invention and its problems]

Conventionally, various non-impact recording methods have been proposed, such as an electrostatic method, a thermal paper heating method, a thermal transfer method, an electrophotographic method, and an infusiera method.

Under these circumstances, the inkjet method is an extremely superior recording method that has various advantages such as low noise, low power, small size, easy multi-color printing, and inexpensive components. Various developments are underway from a certain point.

Infusiella systems include pressure element system, static pressure acceleration system, bubble jet 1 system, etc. However, all conventional inkjet systems emit ink from the tip of a nozzle, and the problem of nozzle clogging has not been completely solved, so the current situation is that they have not been widely used. Another disadvantage is that the recording speed is slow because a large number of nozzles cannot be arranged closely and simultaneous recording of a large number of dots is difficult.

[Purpose of the invention]

The present invention was developed based on the above-mentioned circumstances, and its purpose is to provide a completely new inkjet method that does not use a fixed nozzle, which is free from clogging and capable of high-speed printing, and which The purpose is to provide a recording device with a simple structure.

[Summary of the invention]

In order to achieve the above object, the present invention fills recording ink into a recording medium having a large number of small holes or recesses, and when the small holes or recesses filled with ink reach the surface of a heating element, the heating element By selectively heating the recording material, the pressure of the generated bubbles causes the ink in the small holes or recesses to be ejected toward the recording material, thereby recording on the recording material. Said recorded tJ
A recording medium transport mechanism is provided having a first recording medium transport mode in the same direction as the direction in which the recording medium is moved to, and a second recording medium transport mode in the opposite direction to the direction in which the recording medium is moved to the recording material. , which enables the use of non-endless recording media.

(Example of the invention) Hereinafter, the present invention will be explained with reference to an illustrated embodiment.

Figure 1 is an explanatory diagram showing the recording principle. In the figure, 1 is a thermal head, and 2 is a small hole (orifice) with a diameter of 10 to 200 μm.
2a is a film as a recording medium made of metal, organic material, etc., in which a large number of . is a small hole filled with ink,
Reference numeral 6 indicates an ejected ink droplet, and 7 indicates a small hole from which the ink droplet was ejected. As the film 2 is transported in the direction of the arrow, the ink 4 is filled into the small holes 2a of the film 2 that have passed through the ink reservoir section storing the ink 4. Next, ink 4
When the small holes 5 filled with... reach the thermal head 1 where the heating elements 3... are arranged, the heating elements 3...
・Selectively apply voltage to cause rapid heating. Then, recording is performed by ejecting ink droplets 6 by the pressure of bubbles generated as the heating element 3 is heated.

FIG. 2 is a schematic longitudinal sectional side view showing the recording apparatus of the present invention. In the figure, 8 is a recording paper as a recording material, and this recording paper 8 is attached to a paper feed force sensor attached to the main body casing 134 of the apparatus. A large number of paper sheets 1 to 49 are stored at once, and the lower surfaces of these paper sheets on the take-out side are pushed up toward the soil by push-up springs 33 . It is ready to be obtained. When the paper feed cassette 49 is attached to the apparatus main body casing 134, the rubber magnet 47 attached to its tip is magnetically attracted to the plate 48 provided on the apparatus main body casing 134 side, and the paper feed cassette 49 is attached to the apparatus main body casing 1.
It is fixed at 34.

The shaft 139 to which the first feed roller 9 is attached is
As shown in FIG. 3, the paper feed solenoid 51
Paper feed spring clutch 63 and gear 5 turned OFF
6.55, it is configured to be interlocked with the paper conveyance motor 54. Then, the paper feed solenoid 51 is connected to the image/data processing device 133 (15th
The paper feed spring clutch 63 is turned on by being excited in response to a recording command (see figure), thereby transmitting the movement of the paper transport motor 54 to the shaft 139 via the gears 55, 56 and the paper feed spring clutch 63. The recording paper 8 at the F-most end that comes into contact with the first feed roller 9 is fed.

-〇- Also, the paper feed cassette [・4
The recording paper 8 taken out from the first paper feed guide 714
H) and furthermore, the first,
The paper is fed between the second paper feeding kites 44 and 45, and is fed to the suction transport of the recording material transport mechanism 43 until the leading end hits the contact area between the recording material transport mechanism 43 and the stopped registration roller 11. and waits in this state.

Note that this device is capable of feeding paper from the manual paper feed table 17 in addition to paper feed from the paper feed cases I to 49.
The distribution paper 8 such as thick paper set all at once on the manual paper feed tray 17 is passed through the second feed roller 19 and the separation roller 18.
As a result of the movement of the sheet, the sheets are taken out one by one starting from the bottommost sheet, and as in the case of sheet feeding from the sheet feeding cassette 49, the suction conveyance bell I.15 and the stopped register [roller 11 and It is fed until the tip hits the contact part of
Wait in this state.

The registration roller 11 is adapted to be interlocked with the paper conveyance motor 54 (see FIG. 3) via a clutch section (not shown), and is rotated when the clutch section is turned on. The rotation start and stop timing of the registration roller 11 is such that the leading edge of the recording paper 8 is at the 11th F.
l') 21 and the conduction of the first photosensor 22 is reduced to O.
It is determined that after a certain period of time has elapsed after the FF is turned on, the leading edge of the recording paper 8 hits the rolling contact portion of the registration roller 11 and an appropriate slack is generated.

By doing this, the leading edge inclination (skew) of the recording paper 8 is corrected, and the leading edge of the recording paper 8 is reliably pushed into the rolling contact portion of the registration rollers 11, and the recording paper 8 is It ensures a good bite.

Note that a paper waste removing brush 50 for removing paper waste adhering to the peripheral surface of the registration roller 11 is in sliding contact with the registration roller 11 to prevent the recording surface of the recording paper 8 from becoming dirty.

The recording material conveying mechanism 43 includes the first and second rollers 12.14 and the rollers 12.14 within the housing portion 140.
A suction conveyance mechanism section 43a as a first floating section is assembled into a unit by incorporating the suction conveyance belt 15 and the air suction duct h30 passed to the suction conveyance mechanism section 43a as a first floating section. It has a built-in belt guide plate 27 as a second floating part, and by displacing this belt guide plate 27, the suction conveyance belt 15 is moved to the recording section guide 31.
It is composed of a belt pressing/retracting means 43b that presses the belt to the side or retracts it.

The belt pressing/retracting means 43b has the following configuration. That is, the belt guide plate 2 as the second floating part
7 is housed in an air suction duct (30) with one end rotatably supported and the other end constantly biased downward by a belt guide plate pressing spring 26, and the suction conveyor belt 15 is It is adapted to be pressed against the recording unit guide 31. Also, an adsorption member 141 is attached to the back surface of the pressing plate 27 in a state facing the electromagnetic coil 28, and the electromagnetic coil 28 When energized, the pressing plate 27 is displaced against the urging force of the pressing spring 26.

In addition, the suction conveyance mechanism section 43a as the first floating section is elastically moved by the roller pressing spring 25 hung on the tenth roller 12, and the belt guide plate 27 as the second floating section is elastically moved by the pressing spring 26. When thick recording paper 8 is supplied, it can be displaced by that amount.

In addition, the impact of the belt guide plate 27 as the second floating part is
It is designed to be damped by a high viscosity fluid damper 29.

As described above, the recording material transport mechanism 43, which is composed of the suction transport mechanism section 43a and the belt pressing/evacuating means 43b, and is provided floatingly with respect to the relothermal elements 3...
It has a structure that can be freely rotated around the axis of the roller 12.
It can be rotated in the direction of the arrow in FIG. 2 to open the recording paper conveyance path.

As the registration rollers 11 start rotating, the leading edge of the recording paper 8 connects to the registration rollers 11 and the suction conveyance mechanism section 43.
The recording paper 8 is caught between the suction conveyor belt 15 of
is clamped with appropriate pressure by the biasing force of the mouth-to-mouth pressing spring 25. Then, the registration roller 11 and the tenth-
The material is conveyed by the clamping conveyance force of the roller 12 and the suction conveyance force by the suction conveyance bell 1-15.

At this time, the recording paper 8 is moved by the belt pressing/retracting means 431)
The paper is pressed against the recording section guide 31 by the action of , and is conveyed while rubbing against the recording section guide 31.

The recording section guide 31 is fixed with respect to the thermal head 1, so that the sliding surface of the recording section kite 31 is maintained at a constant interval from the heating elements 3.... The recording surface (lower surface) of the recording paper 8 always maintains a minute gap, for example, 0.2tta, from the surface of the film 2, which moves while being in close contact with the heating cables 3 disposed in the head section of the thermal head 1. It has a structure that allows it to be moved while being maintained.

In fact, according to the performance test in the example, it was confirmed that the gap between the surface of the film 2 and the recording surface must be between 0.1 and 0.3 m in order to maintain a resolution of 8 lines/s. , was done.

However, if the gap is set to 0.1 m or less, the ink 4
It has also been confirmed that when the ink penetrates into the recording paper 8, this portion expands and the recording surface comes into contact with the surface of the film 2, creating a risk that the recording section will be stained with the ink 4. Therefore, in this embodiment, the arm portion of the recording section guide 31 is pressed against the recording section guide fixing reference protrusion 135 (see FIG. 6) of the thermal head 1, and the gap is set strictly to 0.2±0.05 m. Managed.

When the leading end of the recording M8 moves further forward, it is held and conveyed by the 20th roller 14 of the suction conveyance mechanism section 43a and the discharge roller 13. In this poem, the recording surface of the record M8 is supported in a dotted manner by the nail-shaped roller portion 1 (') 4 of the paper ejection roller 13, and reference roller portions 105 and 106 are connected to the suction conveyance belt 15 at both ends. Since they are in contact with each other, they are conveyed without being subjected to excessive pressure, so that undried recorded images are not disturbed. (See FIG. 7) Furthermore, the recording M8 moves forward, and its rear end passes through the rolling contact portion of the registration roller 11 and the tenth roller 12. At this time, y on recording paper 8! The end portion receives the full load of the recording material transport mechanism 43 and is transported while being rubbed against the recording section guide 31. In other words, the basic conveyance force of the recording paper 8 is only the suction conveyance force of the suction belt 15, and since the recording paper 8 is conveyed while being subjected to a large frictional force, the conveyance is accompanied by uncertainty.

However, in this embodiment, the force for pressing the recording paper 8 against the recording section guide 31 is transmitted through the belt pressing/retracting means 43b, and the belt guide plate 27 as the second floating section Due to the reaction force from the section guide 31, the high viscosity fluid M is passed through the high viscosity fluid M disconnector 29 while resisting the bell I/guide plate pressing spring 26, and is moved upward relative to the housing section of the suction conveyance mechanism section 43a as the first floating section. be pushed up.

In this way, after the trailing edge of the recording paper 8 has passed, the register 1-roller 11 and the suction conveyance belt 15, which have been temporarily separated, come into rolling contact again, so that the pressure applied to the recording paper 8 is reduced and the belt guide Full load on plate 27 and bell 1
- The recording paper 8 can be conveyed smoothly only by the biasing force of the guide plate pushing spring 26.

Further, the 82 recording paper 8 moves forward, and when the rear end of the recording M8 passes the edge portion of the recording section guide 38 on the thermal head 1 side, the belt guide plate 27 receives no reaction force from anywhere, and the belt guide plate 27 receives no reaction force from anywhere. The entire load of the guide plate 27 and the force of the belt guide plate pressing spring 26 push the belt guide plate downward.

Therefore, as soon as the rear end of the recording M8 passes the edge portion of the recording unit guide 31, the surface of the film 2 and the recording surface of the recording paper 8 come into contact, and the rear end of the recording paper 8 is covered with the ink 4. It has the problem of getting dirty.

However, in this embodiment, this problem is solved by the measures described below. First, since the belt guide plate 27 as the second floating part has already been pushed upward through the high viscosity fluid buffer 29 as described above, the rear end of the recording paper 8 passes through the edge part of the recording unit guide 31. Even if it moves downward, it will slowly descend due to the buffering effect of the high viscosity fluid buffer 29. Therefore, recording sheet 8
The trailing edge of the recording paper 8 can be made to pass through the heating cord 3 while the recording surface approaches the surface of the film 2.

Furthermore, in this embodiment, the leading edge or trailing edge of the recording paper 8 is folded or bent to prevent the recording paper 8 from coming into contact with the surface of the film 2. The electromagnetic coil 28 is excited so as to move away from the surface of the film 2 by ±6M at each end with the heating element 3 in between, and the entire belt guide plate 27 as a second floating part is attracted upward. That's what I do.

In this way, the recording paper 8 does not come into contact with the film 2 and get dirty, and passes through the roller 13 placement part while maintaining an extremely small gap, so that the recording paper 8 is delivered to the discharged paper 1 with a clean record. ~The paper will be ejected onto the tray 16.

Also, when the paper is ejected, the trailing edge of the recording paper 8 is at the 21st
ft of the second photosensor 24,
By detecting the rising signal, it is detected that the recording paper 8 has been reliably ejected.

Next, referring to FIGS. 2 and 3, the ink container 64
From recording medium car 1 to film car 1 as a storage medium
Concerning the supply of ink to the ridge 40 and the supply of ink from the ink supply section of the film cartridge 40 to the film 2).

The film cartridge 40 and the ink container 64 are separable. The ink 4 is stored in an ink container 64, and this ink container 64 is used for the film cars 1 to 4.
The ink container attachment of No. 0 is screwed into the part 65 and fixed.

At this time, the transparent ink supply tube 7 of the ink container 64
1 pushes up the valve 68 of the film cartridge 40 that is in close contact with the ink container attachment seal 73 against the biasing force of the cartridge valve spring 69.

On the other hand, the valve 68 of the film cartridge 40 pushes up the ink container opening/closing rod 70, which in turn pushes up the valve 67 of the ink container 64 against the valve spring 66, causing the ink 4 in the ink container 64 to move upward. to flow out. The ink 4 that has flowed out from the ink container 64 flows out until the diagonally cut tip of the transparent ink supply tube 71 is filled, and then flows through the valves 68 of the film cars 1 to 4o.
The fine ink supply passages 72 and 93 (sixth
(see figure).

The ink 4 further permeates into the ink supply members 37 and 39 constituted by the ferls 1 to 39, through which the ink 4 is applied to the film 2, and therefore the small holes 2a of the film 2 are filled with the ink 4. The recording ink droplets 6 are used by bubbles in the ink 4 due to the movement of the film 2 and the rapid heating of the heating elements 3 .

In this way, when the ink 4 is consumed and the level of the ink 4 falls below the diagonally cut portion at the tip of the transparent ink supply tube 71, air is sucked in from the air suction passage 74 provided in the ink supply section of the film cartridge 40. Then, this air flows into the ink container 64 through the diagonal cut portion of the transparent ink supply chiko 171, causing new ink 4 to flow out.

By the way, the air suction passage 74 is located at the upper part of the ink supply section, and the air volume within the ink supply section is made as small as possible as seen from FIGS. 2 and 3. A first surplus ink scraping member 41.90 made of rubber and a second surplus ink scraping member 4
According to 2.89, air can enter and exit the ink supply section only when the small holes 2a of the film 2 pass through the first and second surplus ink scraping members 41.90.42.89. Therefore, replenishment of the ink 4 from the ink container 64 to the ink supply section is possible only when the film 2 is being moved, and there is no need to worry about non-conformities such as when replacing the film 11 to the cartridge 40 or when moving the film 2. This is not done during operation.

Therefore, the problem of ink 4 being excessively supplied to the film cartridge 40 and leaking from the film cartridge 40 and scattering can be prevented.

Furthermore, since the ink 4 is supplied to the film 2 through the ink supply members 37.7 made of felt as shown in FIGS. 2 and 3, it is freely supplied as a liquid within the ink supply section. Since the ink 4 can be prevented from forming a surface and the ink 4 is captured between the fibers by the force of surface tension, it is easy to prevent the ink 4 from leaking out of the film cartridge 40.

Next, the operation for removing the ink container 64 from the ink container mounting section 65 of the film cartridge 40 will be described.

When the ink 4 in the ink container 64 is consumed by the above-described replenishment of the ink 4, the level of the ink 4 further decreases and reaches the transparent ink supply tip 71. At this time, the light from the ink detection LDE 75 begins to pass through and the ink detection photosensor 76 begins to be turned on. The rising edge of this signal is detected to detect whether there is no ink in the ink container 64.

Based on the ink out detection signal, the device detects whether the display portion of the device or the image/image connected to the device.
On the display part of the data processing device 133, as described later, if there is ink 4 in the thermal head 1, there is no ink in the ink container 64, so that a message is displayed to support replacing the ink container 64. It has become.

In this way, the ink container 64 is replaced. In this embodiment, the removal procedure and the valve 64 of the ink container 64 are replaced.
7. The operation of the valve 68 of the film cartridge 40 is exactly the opposite of that during installation.

That is, the valve 68 of the film cartridge 40 is raised, and the ink container attachment is brought into close contact with the lower surface of the part seal 73 by the force of the cartridge valve spring 69, and the ink 4 in the filler car 1 to cartridge 40 is transferred to the ink container. Installation is part 65
This prevents the liquid from leaking and scattering to the outside.

By the way, the ink container 64 has a capacity of 100c in this embodiment.
Except for the ink supply chip 71, which was installed earlier in c, the container is opaque considering the weather resistance of the ink 4, and the normal recording density is 2000 to 5 on an MA4 plate for sheet-like recording.
On the other hand, the film cartridge 4o records about 100,000 sheets/A4 due to problems such as clogging due to paper dust, mold, and dried ink in the small hole 2a of the film 2, and has to be replaced every 3 years. Is required. For this reason, the film cartridge 40 and the ink container 64 are separable, and the structure is such that leakage and evaporation of the ink 4 in each container can be easily prevented.

The attachment of the film cartridge 40 to the recording apparatus will now be described.

In this apparatus, the thermal head 1 is fixed to the main body housing 134, and the film cartridge 40 is shown in FIG.
) and a container located at the film exposed portion 86 of the cartridge 40 shown in FIG. .

That is, in FIG. 3, when the film cartridge first support part 60 is inserted into the main body housing 134 and the film cartridge second support part 61 provided at the other end is pushed down, the cartridge fixing spring 62 is moved to the right. , the head of the fixing spring 62 falls into the recess of the second film cartridge support portion 61, and the film cartridge 40 is fixed.

As described above, since the container portions of the film cartridge 1 to the cartridge 40 are window-shaped, the film cartridge 40
It has a structure that provides sufficient strength.

In addition, since the installation is as described above, it is easy to attach and detach the film cartridge 9400, and the ink container 64
It can be easily attached and detached even if it is still attached. In other words, the color of the ink 4 can be easily changed. When the film cartridge 40 is attached or removed, the recording member 43 rotates as shown by the arrow in FIG. It is wide (opened), and it is easy to remove paper jams in the recording section, remove paper waste from the film 20, replace the film car 1 and the ridge 7IO, etc.

Note that when the film cartridge 1 to the cartridge 40 are removed, the film cartridge 4o is equipped with a cartridge lid as shown in FIG. 5 in order to prevent the ink 4 remaining in the film cartridge 4o from leaking or evaporating. 8
5, which rotates as shown by the arrow to cover the exposed film portion 86, and the protruding portion of the lid 85 serves as the first excess ink scraping member 41,90 of the film car 1 to the cartridge 40; and second surplus ink scraping member 42.8
9 to tightly seal the film cars 1 to 4o.

In addition, the ink absorbing members 371 and 35 shown in FIG.
- There is a problem that the ink may flow down through the wall surface of the thermal head 1 and be scattered inside the device, but in this embodiment, the ink absorbing members 34 and 35 that are in contact with the thermal head 1 are attached to the lower part of the normal head 1, The ink 4 that is about to scatter is absorbed to prevent the above-mentioned problem.

Next, the operation when driving the film 2 will be described.

FIG. 4(a) is a side view of a drive section of the film transport mechanism 143 as a recording medium transport mechanism, and FIG. 4(b) is a plan view of the same portion. The film 2 rotates clockwise and counterclockwise as viewed from the side of the film drive motor gear 58 as a recording medium drive motor gear of the film drive motor 52 as a recording medium drive motor.
In FIG. 4(a), it moves upward and downward, respectively. When the film drive motor gear 58 rotates clockwise, the film drive gear 78 rotates clockwise as viewed from the side of FIG. 4(a).

Drive shaft 8 for moving the film as a drive shaft for moving the recording medium
Since one end of the left-handed spring 84 fitted to the drive shaft 87 is engaged with the recess of the gear 78, clockwise rotation of the gear 78 is a direction in which the left-handed spring 84 is further wound around the film moving drive shaft 87. The power of the gear 78 is transmitted to the film moving drive shaft 87.

At this time, the film drive gear 59 as a recording medium drive gear also rotates clockwise, but the right-handed spring 83 fitted on the film movement drive shaft 88 as a recording medium movement drive shaft is relatively driven. It acts in the direction of loosening from the shaft 88. However, in the case of the embodiment, the drive shaft 8
8 and the right-handed spring 83 rotate in the same direction, so the drive shaft 88 and the right-handed spring 8 are substantially rotated.
A slip with 3 will occur.

By the way, when attaching and detaching the film cars 1 to 4o, the film drive gears 59 and 78 are engaged separately from the motor gear 58, so there is a risk that the film 2 will remain loose or that too strong tension will remain. have.

However, regarding the latter, in the configuration of this embodiment, the drive shaft 88 and the right-handed spring 83 slip, and such excessively strong tension can be alleviated.

=25- Furthermore, as shown in the perspective view of the moving mechanism of the embodiment in FIG. Since the tension mechanism 142 is provided, there is no loosening of the film 2, and the film 2 can be formed while rubbing against the tip heating element 3 of the thermal head 1 with appropriate pressure. A ladder wheel 100 is fixed to one end of the film moving drive shaft 87 by a bin 101, and an externally wound torsion spring 95 with one end engaged with a torsion spring fixing portion 96 is fitted to one end of the drive shaft 88. , the other end of the torsion spring 95 engages with the recess 98 of the rudder wheel 97, and the rudder wheel 97
is connected to the ladder wheel 10 via the ladder chain 99.
Connected to 0.

By the way, when the ladder chain 99 is hung on the ladder wheel 97.100, the recording medium winding is carried out via the 1-john spring 95. When winding the film 26, the shaft 38 is installed by appropriately twisting the torsion spring 95 in advance so as to bias it in the winding direction.
Appropriate tension can be applied to the l~-john according to the torsional force, or torque, of the spring 95.

This eliminates the problem of the film 2 loosening when attaching the film cartridge 40 to the device, and ensures that the film 2 always slides in close contact with the tip of the thermal head 1 with appropriate pressure. It looks like this.

Next, referring to FIG. 4(a), the driving gear 58 is
The case where the rotation is counterclockwise when viewed from the installation 1 side of item 8 will be explained.

At this time, the drive gear 59 rotates counterclockwise, and the right-handed spring 83 acts to become entangled with the film drive shaft 88. In this way, the film 2 can be moved downward in this case, and the film 2 can be moved back and forth according to the rotation of the film drive motor 52 in the 81 direction and counterclockwise direction, and the Ishinomaki spring 83 and the left-hand spring 84 The action of the film tension mechanism 142 prevents the film 2 from loosening when the film force = WIIR of the cartridge 40 occurs, and also prevents damage to the film 2 and the I-N thermal head 1 due to excessive tension. .

In any case, by the operation of the film drive motor 52 described above, the film 2 is moved back and forth, and the multi-hole portion 92 of the film 2 is filled with the ink 4 in the heating element 3 of the thermal head 1 to perform recording. is now possible.

Further, the film 2 is guided by guide means consisting of lead guides for the film 2, which are shown at 102 and 103 in FIGS. 6 and 9, located at both ends of the thermal head 1, so that the film 2 can be prevented from shifting laterally. It has become.

By the way, it is necessary to know whether the start and end of the multi-hole portion 92 of the film 2 are at the above positions, and when starting recording, the starting position of the multi-hole portion 92 in the moving direction of the film 2 is determined by the heating element 3. You need to be able to start recording when you reach the location. In this example, Fig. 4(a)
, (b), a film position indexing board 80 as a recording medium position indexing board is attached to the drive shaft of the film drive motor 52, and the starting position of the multi-hole portion 92 of the film 2 is determined on this indexing board 80. Film first position detection slit 81 as shown in the recording medium first position detection slit 1
A second film position detection slit 82 is provided as the recording medium cylinder 2 position detection slit 1, and a film position detector 79 detects the position of the film 2.

The rotating film position detector 79 of the film drive motor 52 detects short light pulses and light emitting pulses caused by the similar slits and long slits of the slits 1 to 81,
In response to this, a comparison is made with a clock pulse of a constant period built into the electric utility circuit 32, and when the slit 81 is a long slit, at the rear end in the anti-rotation direction, the slit 81 is a slit for detecting the first position of the film. The single light pulse of the slit 1-82 is detected by the film position detector 7.
9, and it is determined that this is the slit for detecting the second position of the film. In this way, the film drive motor 52 detects the film first position detection slit 81 and stops.

At this time, the non-perforated portion 91 of the film 2 (see FIG. 12)
Covering the exposed film portion 86 of the film cartridge 40, the multi-hole portion 92 covers the first and second portions of the film cartridge 40.
The second surplus ink scraping member 89,90 is housed in the ink supply section below. For this reason, the film cartridge 40 is held by the non-perforated portion 91 of the film 2, so that the film cartridge 40 is sealed from the outside air.

Therefore, the ink 4 in the film cartridge 40 evaporates and the viscosity of the ink 4 becomes large, reducing the speed at which the ink 4 flies out of the small holes 2a of the film 2, or the viscosity is too high to eject, which adversely affects recording. This makes it possible to prevent the problem of causing problems.

Now, when recording, images and
A recording command is received from the character data processing device 133 (see Figure 1-30 = 5), and the film 2 is held for a certain period of time before driving the first feed roller 9 to feed the recording paper 8 to the recording section. That is, by rotating the film drive motor 52 in the counterclockwise direction as shown by the arrow in FIG. When the recording paper 8 arrives, the film 2 is moved in synchronization with the leading edge of the recording paper 8.1! Ru. At this time, the moving speed of the film 2 is 20 nm/sec, which is 1/2 of the moving speed of the recording paper 8, 40 shoes/sec.

In fact, even when the speed of the recording M8 is varied between 10 and 100 ai/sec, the relative movement direction of the film 2 and the recording paper 8 is in the same direction at the recording density of the recording paper 8, that is, the coverage rate is 75%. It was found that regardless of the reverse direction, if the moving speed of the film 2 is V/4 or more -1, the film 2 becomes more than Dl,n (black solid, coverage 75%).

The pattern of this experiment is shown in FIG. Therefore, the movement width of the film 2 can be made shorter than the recording length (recording direction) of the recording paper 8, and therefore the multi-hole portion 92 of the film 2
The zero area could be made small, and the production of the film 2 could be made easier. That is, if the area of the multi-hole portion 92 is large, it is desirable to make the diameter of the small holes 2a (25 to 30 μm) uniform over the entire area. The problem of becoming
Recording density becomes uneven. In this embodiment, since the area can be reduced, such problems can be prevented from occurring.

Now, as the film 2 moves in this manner, the rear ends of the multi-hole portion 92 on the side of the first and second surplus ink scraping members 89 and 90 reach the portion of the heating element 3. At this time, the film position detector 7 detects the second film position detection slit 82. Of course, in order for the relative positions of the positions of each part of the film 2 and the phase n of the first and second position detection slits 81 and 82 of the film position index M2O to have the above-mentioned relationship, it is necessary to During initial setting, the film 2 is used as the first and second surplus ink scraping members 89
．． 90 side, and the film drive motor 52 is configured such that the film position detector 79 detects the position of the long slit 1 to the similar slit of the film first position detection slit 81, and the position of the similar slit among the similar slit pairs. It is necessary to detect and stop the

This embodiment is based on this assumption.

Now, when the recording paper 8 is continuously fed and an even numbered recording paper 8 is recorded, the first one of the multi-hole portion 92,
After the end of the second surplus ink scraping member 89 and 90 side reaches the film winding shaft 38 and the ink 4 is supplied, the film 2 is rolled in the opposite direction to the moving direction of the film 2 as previously described. It moves and waits for the terminal end to reach the heating element 3 for a certain period of time, and then records are recorded in synchronization with the tip of the recording M8.

In addition, in continuous A1 recording, the odd numbered recording paper 8
When recording, the first and second surplus ink scraping members 4
1. The end of the multi-hole portion 92 on the 42 side is the film winding shaft 3
6 and after being supplied with the inter 4, the heating element 3
. . , and the film 2 is moved in synchronization with the leading edge of the recording paper 8.

Since recording is continued by such reciprocating movement of the film 2, continuous recording is possible even if the film is not endless.

Now, next, the first and second surplus ink scraping members 41.
90 and 42.89 are arranged such that the contact positions with the film 2 are staggered as shown in FIG. It is located above 90. The necessity of this arrangement will be explained with reference to the first and second surplus ink scraping members 41 and 42.

First, film 2 is wound with the axis 36.
Unless it is arranged so that it reaches the top of the multi-head 1 and moves downward, it is impossible to accommodate the recording portion in the convex 1~ and convey the recording paper 8 close to the heating element 3 while maintaining a tight gap. .

Therefore, if the first surplus ink scraping member 41.90 is positioned below the thermal head 1 side with respect to the film 2, the second surplus ink scraping member 42.89 The distance between and the area of the film exposed portion 86 of the film cartridge 40 of the film 2 can be reduced.

Therefore, the film cartridge 40 can be formed compactly. The effect of scraping off excess ink during movement of the film 2 is as follows.

First, the case where the film 2 moves in the direction of arrow G in FIG. 6 will be described. The film 2 supplied with the ink 4 by the ink supply member 39 moves in one direction, and the surplus ink is scraped off from the film 2 by the first surplus ink scraping member 41 . However, during recording, since the multi-hole portion 92 passes through the surplus ink scraping member 41, the excess ink 4 moves by a certain amount to the side opposite to the thermal head 1 through the multi-hole portion 92.

Further, the ink 4 that has moved to the opposite side is scraped off by the second surplus ink scraping member 42, and moves to the thermal head 1 side again. In this way, when the film 2 moves in the G direction and the multi-hole portion 92 of the film 2 passes the first and second surplus ink scraping members 41, 42, the film 2 has only the small holes 2a... Not film 2
A sufficient amount of ink 4 is applied and replenished over the entire surface.

Therefore, as mentioned above, it became possible to reduce the film speed to 1/4 compared to the speed of the recording paper 8. 92 is the first and second surplus ink scraping member 4
Let us consider the case where the portion L42 is moved downward.

In this case, the recording side surface of the film 2 is first scraped off by the second surplus ink scraping member 42.

Therefore, the excess ink 4 adhering to the surface of the film 2 is scraped off, and the dust and paper dust adhering to the film 2 are also scraped off. In this way, the ink 4 accumulated at the tip of the excess ink scraping member 42 moves to the thermal head 1 side through the small holes 2a of the multi-hole portion 92 of the film 2.
Next, it is scraped off again by the first surplus ink scraping member 41 and accumulates at the tip of the first surplus ink scraping member 41 .

This scraped and accumulated surplus ink 4 is returned to the small holes 2 of the multi-hole portion 92 on the opposite side of the thermal head 1.
Move through a... In this way, the surplus ink 4 during recording is removed from the ink 4 of the film cartridge 40.
is collected in the supply section.

On the other hand, the non-perforated portion 91 of the film 2 moves in the F direction, that is, downwardly toward the first and second surplus ink scraping members 4.
The state when passing 1.42 will be described. At this time, the surface of the film 2 opposite to the thermal head 1 has already been cleaned by the second surplus ink scraping member 89, so the second
There is no need to scrape off ink using the surplus ink scraping member 42.

However, 11 pieces of paper dust and dirt accumulate at the tip of the second surplus ink scraping means 42.

On the other hand, since the film on the thermal head 1 side has also been cleaned by the first surplus ink scraping member 90,
There is also almost no need for ink scraping by the first surplus ink scraping member 41.

In this way, the non-perforated portion 91 of the film 2 becomes the film exposed portion 8 as the recording medium exposed portion of the film cartridge 40.
By covering the film 6, the exposed portion of the film 2 is thoroughly cleaned, and there is no danger of getting hands dirty when attaching or detaching the film car 1 to the ridge 1IIO.

Furthermore, since the lengths M and N (see FIG. 12) of the non-hole portion 91 in the moving direction are longer than the film exposure width F (see FIG. 6) of the film cartridge 40, the first excess ink scraping Member 41.90° Second surplus ink scraping member 4
Air can be prevented from entering and exiting through the gaps between 2.890 and 2.890 mm.

Therefore, the evaporation of the ink 4 can be prevented, and the viscosity of the ink 4 can be prevented from changing, so that the quality of recording and printing can be maintained constant.

Next, the operation for removing paper waste adhering to the film 2 will be described.

As described above, when the film 2 is moved in the G direction, the paper scraps and dust accumulated on the tip of the second surplus ink scraping member 42 are moved together with the film 2 while remaining attached to the film 2, and the paper scraps and dust accumulated on the tip of the second surplus ink scraping member 42 move together with the film 2 while remaining attached to the film 2. It comes to the heating element 3 part at the top of . At this time, transfer film 2 to thermal head 1.
Hold the heating element 3 and move it back and forth several times, at the same time start the suction fan 53 shown in Fig. 3, and move the suction bell 1 to
Paper scraps and dust on the film 2 described above are sucked into the air suction guide 57 through the suction port 107 of No. 5.

In this way, paper dust and dirt attached to the film 2 can be removed, and the multi-hole portion 92 of the film 2
This prevents the small holes 2a from becoming clogged with paper powder and dirt.

In this embodiment, the paper waste removal process is carried out after a certain period of time after a series of continuous recording is completed, so that the problem of reducing the recording speed does not occur.

In addition, as described above, since the paper waste removal process is carried out on the non-porous portion 91 of the sea urchin film 2, the ink 4 on the film surface is cleaned, so the ink 4, etc. enters the air suction guide 57. It is also possible to prevent problems such as the ink 4 being sucked in or adhering to the suction bell i-15.

Here, the operation of the film 2 when a series of recording operations is completed will be described.

After a series of recording operations is completed, the film 2 is moved for a certain period of time at a speed slower than the moving speed during recording.

This is done to prevent the ink 4 from being depleted from the heating elements 3 of the thermal head 1 until the series of recording operations is completed. Thereafter, the paper waste removal step described above is continued for a certain period of time, and then the exposed film portion 86 of the film cartridge 40 is covered with the non-perforated portion 91 of the film 2.
-By the way, the first surplus ink scraping member 41.90
is made of an elastic member, and its edge toward the thermal head 1 is located on the lower surface of the film 2 and comes into close contact with the thermal head 1, and the ink 4 that flows down through the wall surface of the thermal head 1 is directed to the multi-hole portion of the film 2. The ink can be collected into the ink supply section of the film car 1 heritage 40 through the small holes 2a of 92. Said first
, second surplus ink scraping member 41.90, and 42.
89 is made of a non-breathable material that prevents air and ink 4 from entering and exiting the film cartridge 40.

Next, the relationship between the diameter of the small holes 2a of the film 2 and the pitch between the small holes 2a will be explained with reference to FIG.

The arrow ■ in the figure indicates the moving direction of the film 2, and the small 7L 2
The line connecting the centers of a is an equilateral triangle with one side perpendicular to the arrow ■. In the figure, H and V are the dimensions of the heating element 3, which are 100 tt m to 125 I1 m, respectively. The diameter of the small hole 2a in the figure is 25 mm in the example.
11 m, and the distance P between the centers of the small holes 2a is 45 μm.
The minimum distance between a and the small hole 2a is 20 μm. According to experiments, using the above-mentioned symbols, if the maximum distance between adjacent small holes 2a is P, then satisfying the relational expressions ≧2P and V≧2P+D, and resolving power of 8 lines/ In the case of M, the t\D of the small hole 2a is D = 15 to 35 ttm,
In order to obtain good print quality, it was necessary to set P within the range of P-40 to P-50 II m.

Special considerations are required to achieve good print quality and improve thermal efficiency during recording, regardless of the shape of the heating element 3.

FIG. 14 shows the cross-sectional shape of the heating element.

Here, the heating element 3 and the electrical conductor 108.121 are A
It is covered with a thin wear-resistant insulating film 136 such as A203. Now, a voltage is applied to the heating element 3 and it is rapidly heated.
Bubbles are generated, and due to this pressure, the ink 4 in the small hole 2a filled with ink 4 is rapidly ejected and recorded. Recording is performed by applying a pulse with a pulse width of 10 μsec to eject recording ink. At this time, the energy consumed is approximately 2100 erg/element.

This energy is approximately constant when the thickness T of the gap 124 between the heating element and the film 2 is 3 μm or more, but when T is 1
When the thickness exceeds 0 μm, the jetting force becomes poor and the printing quality deteriorates. It was also found that as the size of the ink decreases to 3 ttml, the energy consumption of ink per 3 heating elements becomes 2100 or more, and it was found that the smaller the value of ■, the more energy is required. Therefore, in this embodiment, T=3μ
It was set as m. In the figure, 122 indicates a glass gelase layer.

Next, the following improvements have been made in terms of the durability of the heating element 3.

That is, as proposed in Japanese Patent Application No. 59-11851, the heating element (heating resistor) is mainly composed of ruthenium oxide, M (M is Ca).

At least one oxide selected from 3r, Ba, Pb, B i , TA) with an M/Ru (atomic ratio) of 0.6
A metal oxide thin film containing ~2 is used.

By using a metal oxide thin film in this way, there is no need to consider changes in resistance due to oxidation, as in the past, and it becomes possible to apply large amounts of power and reach high temperatures.
It also increases stability during long-term use. In addition, since this metal oxide thin film has a relatively high resistance value,
High fever V1! A relatively small current is required to obtain the desired temperature.

Therefore, less current flows through the conductive layer connected to the heat generating resistor as in the conventional case, and heat generation from this portion can be reduced. Therefore, so-called print blurring that occurs during printing can be reduced. In addition, since such a thin film has a positive resistance concentration of 1, it can improve the drawbacks of Sn□+-based materials, and has features such as being able to apply a large amount of power from the initial stage and being suitable for speeding up. be.

Next, the structure of the thermal head will be described based on FIG. 11.

The structure of the heating element 3 is shown in FIG. 14, but in this embodiment, the heating element 3 and the electric conductor 108
is formed on a polyimide film 1230 with a thickness of about 15 μm, which is attached to a metal support 1 made of aluminum.
It has a structure in which it is adhesively fixed to 37. It is estimated from the calculation of the consumed energy distribution that most of the energy consumed by the pulsed heating of the heating element 3 (10% 1z+) is not used for ejecting the ink 4, but is used for ejecting the polyimide film 123. This means that they will accumulate materials such as books, films, etc. Note that 119 is a driver for the thermal head 1, and 120 is a protective cover.

In this way, if the A+, [feeding line printer has a resolution of 8 lines/M and a recording speed of 40#1Ill/V as in the embodiment, for example, when recording with a high coverage rate such as graphic 2, etc. The maximum value of the total energy consumption of the thermal head 1 is about 120 W, of which about 107 W is accumulated in the polyimide film 123 and the film.

Such heat accumulation increases the Ω degree of the film 2 and the ink 4 to nearly the Ω degree of the ink 4, and therefore changes the ejection situation of the ink 4 itself depending on whether there is heat accumulation or not. Put it away. In other words, the thermal history of recording causes a problem in that the density of the recorded image becomes uneven.

Therefore, in this embodiment, the heating element 3 is formed integrally with the electrical conductor 45 108, 121 on the polyimide film lx 123 with a thickness of about 1511 m, and this is bonded to the metal support 137 made of aluminum with one glue. Therefore, the thermal energy generated and accumulated in the heating element 3 is quickly transmitted and diffused to the metal support 137.

Since the abutting support is made of metal, the thermal energy diffused into the metal support 137 is thermally conducted very quickly and acts to cool the heating element 3. thus,
The heating cycle of the heating element 3 can be shortened, and the recording speed can be increased.

Next, the structure of the ink presence/absence detection elements 109 and 112 of the thermal head 1 will be described according to FIGS. 9 and 10(a) and (b). In this embodiment, there are exposed conductor portions 110° 111 of the ink presence/absence detection element in which electrical conductors are connected to each other at both ends of the thermal head 1.
(No. 1, 111 does not have the wear-resistant/insulating film 136 and comes into direct contact with the ink 4.

Incidentally, the conductivity of ink is such that a small amount of current can flow if a voltage of 10'S/cm is applied. This state is shown in FIG. 10(a). The exposed conductor portion 110,1
If the ink 4 is at the top of the thermal head 1 as shown in FIG. 10(a), the switch SW is turned ON.
, the voltage at the 0 point is the exposed conductor portion 110.11
Because current flows between 1 and 1, the current decreases temporarily. This signal is amplified to detect the presence of ink. 1st
As shown in FIG. 0(b), when there is no ink 4, no current flows even if the switch SW operates as described above, so the voltage drop as described above does not occur.

As a result, it is possible to detect that there is no ink 4, and it is possible to prohibit the recording operation. As described above, in this embodiment, the heating element 3 of the thermal head 1...
Since ink presence/absence detection elements 109 and 112 are attached to both ends of the row, heating elements 3...
This eliminates the problem of damaging the heating cord 3 by heating it to 1111 degrees and drying it.

In other words, even if there is ink 4 at one end of the heating element row 3 and no ink 4 at the other end, the presence or absence of ink can be detected by ANDing the signals of the ink presence detection elements 109 and 112. Therefore, it is possible to detect when there is no ink.

In this embodiment, as described above, the thermal head 1 is provided with the ink presence/absence detection elements 109 and 112, and the ink container 64 is also provided with replenishment ink presence/absence detection means consisting of an ink detection LED 75 and an ink detection photosensor 76. That's what happened. As described above, these ink presence/absence detection means each have their own roles, and at the same time, as described below, they can cause the recording apparatus of this embodiment to perform various operations depending on the combination of their respective states. .

First, in this embodiment, if a voltage is constantly applied to the ink presence/absence detection means 109 and 112 of the thermal head 1 described above,
Since there is a problem that the ink 4 is electrolyzed and gases such as hydrogen and oxygen are generated and the exposed conductor portions 110 and 111 are corroded, the exposed conductor portions 110 and 111 are removed prior to the recording operation. The presence or absence of ink is detected by applying a voltage to the ink.

Roughly speaking, by doing this, the recording operation is started, for example, after the recording paper 8 has been fed, the recording operation is stopped during recording, and after a while, that is, the ink 4 reaches the thermal head 1. After that, when the recording operation is restarted, the problem of the accurate position of the recording paper being shifted due to the inertia of the feed roller etc. can be prevented in advance.

Further, in this embodiment, when the absence of ink is detected by the ink presence detection operation of the thermal head 1, the film drive motor 52 is driven to move the film 2 for a certain period of time as shown by arrows G and F in FIG. After the reciprocating operation, the ink presence/absence detection operation of the thermal head 1 described above is performed again to detect the presence or absence of ink.

Therefore, even if the ink 4 evaporates and disappears from the heating element array 3 of the thermal head 1 due to a temporary stop, the inside of the film cartridge 40 is reactivated by the above-mentioned ink presence/absence detection operation. It can also detect whether there is no ink 4 or not, and when a new film cartridge 40 is used.
It is also possible to check whether the ink 4 has reached the ink supply member 37, 39 inside the film cartridge 40 from the ink container 64 just after setting the film cartridge.

In this way, when it is detected that there is no ink in the thermal head 1, a status display regarding the lack of ink is displayed on the display section of the image or character or data processing crack 133 to which the recording device is connected, and the operator The system provides instructions on how to deal with the situation.

Incidentally, the ink presence/absence detection operation of the thermal head 1, the ink presence/absence detection signal, the replenishment ink presence/absence detection signal of the ink container 64, and the operation of the recording apparatus are closely related. In fact, in this embodiment, the recording material, that is, the recording paper 8, is fed toward the heating element 3 only when the detection signal of the presence of ink in the thermal head 1 and the detection signal of the presence of ink in the ink container 64 are generated at the same time. I try to do that. As a result, ink 4 runs out during recording, and recording operation = 5
0= Do not interrupt (:(Dangers that do not occur can be prevented in advance.

Further, as described above, when the detection signal indicating that there is no ink in the thermal head 1 and the detection signal indicating that there is replenishment ink in the ink container 671 are generated at the same time, the film drive motor 52, the film movement drive shaft 87, 88, etc. By operating the film moving mechanism, it is possible to cut off the ink 4 from reaching the heating element 3 of the thermal head 1. At this time, transfer the film! The lJ speed is normally 20/V during recording, but it is operated at a slower speed, 5#/V in the embodiment.

As a result, when there is no ink 4, the electrical conductor 108.12 is caused by the friction between the thermal head 1 and the film 2.
This prevents the wear-resistant insulating film No. 1 from being damaged.

In this way, the film moving mechanism is operated to move the film 2 back and forth until the ink-absence detection signal of the thermal head 1 changes to an ink-present signal.

Then, the image or character or data processing device 13 described above
The display section 3 displays an "out" state to notify that the ink 4 is being supplied to the thermal head 1.

By the way, when a detection signal indicating that there is ink in the thermal head 1 and a detection signal indicating that there is no replenishment ink in the ink container 64 are generated at the same time, an ink replenishment signal is sent to the display section of the recording device or the image, character, or data processing device 133. An instruction is displayed to prompt the operator to replace the ink container 64 and replenish new ink 4. In this way, a new ink container 64
is installed and the detection signal indicating that there is no refill ink in the ink container 64 changes to the detection signal indicating that there is ink, the recording operation is maintained at medium pressure for a certain period of time, that is, the recording sleeve 8 is transferred toward the heating element 3. It is also prohibited to do so. This means that enough ink 4 permeates into the ink supply members 37 and 39 in the filler car 1 to the cartridge 40, and the film 2
The ink 4 is always supplied in the same state.

In addition, in this embodiment, the film car 1 to the cartridge 40 can detect the recording by means of detecting that the detection signal indicating that there is no ink in the thermal heater 1 and the detection signal that there is no replenishing ink in the ink container 64 are generated at the same time. It is detected that the device is not being used. This pattern is shown in FIG. In fact, in the above state, the film cartridge 40
is not set, film car 1-ridge 4
Even if 0 is set, it indicates that there is no ink 4 in either the thermal head 1 or the ink container 64.However, in either case, the operator is largely instructed to replenish the ink. -ing

Furthermore, even if there is no means for detecting whether or not the film cartridge 40 is set in the recording apparatus, the thermal head 1 will run out of ink and the container 64 will run out of ink. The case of ``high'' means that the film cartridge 40 has not been soldered. In this manner, in this embodiment, it is detected whether the film car mill ridge 40 is attached or detached by detecting that the ink container 64 of the thermal head 1 is out of ink, the ink container 64 is refilled, and the ink out detection signal is generated at the same time.

Next, the overall structure of the thermal head 1 will be described according to FIG.

In the figure, 137 is a metal support made of aluminum, and the thermal head 1 has metal cooling members 114 and 115 on both sides of the metal support 137. It has sensing elements 117 and 118. In the figure, reference numerals 113 and 116 indicate heating elements of the thermal head 1, which are arranged in parallel with and near the heating element 3.

In this embodiment, the heating elements 113 and 116 of the thermal head 10 are turned ON or OFF by the output signals of the temperature detection elements 117 and 118 according to changes in the environment and the thermal history of the heating element 3, so that the apex portion of the thermal head 1 is turned on or off. It is controlled to maintain a constant temperature.

First, the metal cooling members 114 and 115 are in direct contact with the film 2, and can effectively cool the temperature of the thermal head 1 due to the outside temperature 4 and the thermal layer history, and can suppress the evaporation of the ink 4. In addition, the heat layer history at the apex portion of one normal head 1 can be quickly conducted to the humidity detection element, and the temperature in the vicinity of the heating cables 3 of the thermal head 1 can be controlled at a constant temperature at all times.

Also, the metal cooling members 117 are provided on both sides of the heating cord 3.
118 and 1 normal head 10 heating elements 113 and 116 are arranged, and even when the film 2 moves back and forth, the ink 4 is conveyed to the surface of the heating element 3 and the small holes 2 filled with ink are arranged.
The part a is heated in advance before recording, so that the energy supplied by the voltage pulse applied to the heating element 3 is reduced.

In FIG. 15, 119 is a driver for the thermal head, and 126 to 132 are drive circuit sections.

1 - As explained, according to the one-shot embodiment, the first and second feeding modes are provided in which the film 2 is moved in the same direction and in the opposite direction for the same recording direction. Since the film transport mechanism 143 is provided, even if the film 2 is not endless, the multi-hole portion 92 of the film filled with the recording ink 4 can be brought to the surface of the heating element 3 almost without interruption. The configuration is simple and the recording speed can be increased.

Moreover, this effect becomes greater when the feeding direction of the recording M8 and the recording direction are parallel to each other. This is because in this case, in order to continue recording almost without interruption, the above two modes must be executed. However, in this case, recording can be continued almost without interruption; Ink 4 needs to be replenished. Therefore,
To switch to the second feeding mode, the heating element 3
The used multi-hole portion 92 of the film 2 located between the ink supply member 37 and the ink supply member 37 cannot be used, and the multi-hole portion 9 of the film 2 that is newly filled with the recording ink 4 can be used.
2 must wait for a certain period of time until it reaches the surface of the heating element 3 by reverse feeding. therefore,
If the first and second feeding modes are switched within the predetermined period of time, no recording is performed on the used multi-hole portion 92, so that the same density can always be recorded.

Also, the first and second feeders! In the case of mode switching, if the recording member is sheets 1 to 8, when the sheets of recording paper 8 are continuously recorded, between the leading edge and the trailing edge of these recording sheets 8, By switching between the first and second feed modes, recording can be continued without interruption without reducing the recording speed.

Furthermore, in the explanation of the above-mentioned embodiment, the explanation was given regarding a case in which small holes were provided in a film as a recording medium, but the present defense is not limited to this, and it is understood that the same purpose can be achieved even with a recessed part. Of course.

In addition, it goes without saying that the present invention can be modified in various ways without departing from the gist of the present invention.

〔Effect of the invention〕

As explained above, in the present invention, a recording medium having a large number of small holes or recesses is filled with recording ink, and when the small holes or recesses filled with ink reach the surface of a heating element. By selectively heating the heating element, the pressure of the generated bubbles causes the ink in the small holes or recesses to be ejected toward the recording material, thereby recording on the recording material. , a first recording medium feeding mode in which the recording medium is moved in the same direction as the direction in which the recording medium is moved toward the recording material, and a second recording medium feeding mode in which the direction is opposite to the direction in which the recording medium is moved toward the recording material. A recording medium transport mechanism having a groove is provided, thereby making it possible to use a recording medium that is not endless. Therefore, it is possible to provide a recording device that is free from clogging, capable of high-speed recording, and has a simple configuration.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an explanatory diagram of the recording principle, FIG. 2 is a schematic vertical side view, FIG. 3 is a schematic vertical front view, and FIG. 4(a) 4(b) is a plan view of the drive portion of the film transport mechanism, FIG. 5 is a perspective view of the film car 1 helicopter, and FIG. 6 is a side view of the film transport mechanism and ink supply unit. FIG. 7 is a perspective view of the paper ejection roller section, FIG. 8 is a diagram showing the relationship between the diameter and pitch of the small holes and the shape of the heating element, and FIG. 9 is a perspective view showing the ink presence/absence detection means of the square head. Figure, Figure 10 (
a) is an explanatory diagram of the operation of the ink presence/absence detection means when ink is loaded;
Figure 10 (1)) is an explanatory diagram of the operation of the ink presence/absence detection means when there is no ink, Figure 11 is a sectional view of the thermal head, and Figure 11 is a cross-sectional view of the thermal head.
Figure 2 is an explanatory diagram of the shape of the multi-hole and non-hole parts of the film, the first
Figure 3 is a diagram showing the relationship between film speed and recorded density.
The figure shows the structure near the heating element, and FIG. 15 is a schematic diagram of the electronic control circuit. DESCRIPTION OF SYMBOLS 1... Thermal head, 2... Recording medium (film), 2a... Small hole, 3... Heating element, 4... Recording ink, 5... Small hole filled with ink , 6...
- Ejected ink droplets, 7... Small holes from which ink droplets were ejected, 8... Recording material (recording paper), 32... Electronic system circuit, 36. 38... Recording The media is wrapped around the shaft (
With film winding (pushaft), 37.39... ink fi
t supply unit (ink supply member), 52...recording medium drive motor (film drive motor), 92...multi-hole portion of film, 143...recording medium transport (jl structure (film transport number structure)). Applicant's agent Patent attorney Suzu rT Takehiko Figure 8 Figure 9 (a) (b) Figure 1o

Claims (5)

[Claims] (1) Filling a recording medium with a large number of small holes or recesses with recording ink, and selectively heating the heating element when the small holes or recesses filled with ink reach the surface of the heating element. Therefore, the present invention is a recording apparatus that performs recording on a recording material by ejecting ink in the small holes or recesses toward the recording material using the pressure of the generated bubbles, and the recording apparatus records on the recording material by ejecting the ink in the small holes or recesses toward the recording material. A recording medium transport mechanism is provided having a first recording medium transport mode in the same direction as the moving direction of the recording medium and a second recording medium transport mode in the opposite direction to the moving direction of the recording medium to the recording material. A recording device characterized by: (2) The recording apparatus according to claim 1, wherein the recording medium transport mechanism alternately repeats a first recording medium feeding mode and a second recording medium feeding mode. (3) The recording apparatus according to claim 1, wherein the recording direction on the recording material is parallel to the conveying direction of the recording material. (4) The recording apparatus according to claim 1, wherein the switching between the first and second recording medium feeding modes is performed at regular intervals. (5) The recording material is in the form of a sheet, and switching between the first and second recording medium feeding modes is performed between the trailing edge recording of the preceding recording material and the leading edge recording of the following recording material. A recording device according to claim 1, characterized in that: