JPH03101948A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To adjust a gap between recording paper and a recording head by a method wherein a guide shaft is rotated about the eccentric axis thereof to change an engaging position between the shaft and the recording head or the like and, thereby, the recording head is rotated. CONSTITUTION:In accordance with the type of recording paper 40, a gap between the recording surface of the recording paper 40 and a delivery port of a head element 9a is set properly. Namely, by rotating a knob 51d manually, a guide shaft 51 is fixed on a position of a minimum or maximum distance between an eccentric shaft 51a and a pin 6b. In accordance with this action, a recording head 9 rotates about a lead screw 2 as a rotating shaft and is fixed on a position corresponding to the recording paper 40, which is relatively thin plain paper, or on a position of a large gap corresponding to the recording paper 40, which is relatively thick recording paper, such as an envelope. In addition, when the recording head 9 moves and the pin 6b is to engage with the shaft 51a, the height of the engaging position of the pin 6b is varied. Therefore, a tapered part 51f is provided on the shaft 51, and a tapered face is provided on a trapezoidal cam 51g so as to match the tapered part 51f.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an inkjet recording device.

[Prior Art] In addition to the configuration related to direct recording, this type of apparatus has a system (specific configuration) that performs recording by ejecting ink.

In other words, depending on the recorded data, if a certain ejection port does not eject for a long time, or if the device itself is not used for a long period of time, the ink in the ejection port or the ink chamber communicating with the ejection port may increase due to water evaporation. In addition, ink droplets, water droplets, dust, etc. may adhere to the ejection port surface where the ejection port is installed, and the ejected ink droplets may be pulled by these adhering materials. The discharge direction may also be deflected. For this reason, inkjet recording devices
In order to prevent ejection failure or deflection of the ejection direction, various configurations are provided as a so-called ejection recovery system.

These ejection recovery systems are configured to prevent ejection failures, including preliminary ejection to eject ink onto a predetermined ink-receiving medium to remove thickened ink, and suction of ink from ejection ports and ink chambers. Ink suction to eliminate the above,
Furthermore, there are capping configurations for sealing the ejection port surface and preventing ink moisture from evaporating from the ejection port.

Furthermore, as a measure to prevent deflection of the ejection direction, there is a configuration in which the ejection port surface is wiped to remove dust, ink droplets, etc. adhering to the vicinity of the ejection port.

Furthermore, in recent years, it has become common for inkjet recording apparatuses to be able to record on various recording media such as plain paper envelopes, and are designed to accommodate the particular thickness of these recording media.

That is, a mechanism is provided that adjusts the distance between the recording head and the recording medium so that the distance between the recording head and the recording medium is appropriate during recording, depending on the recording medium used.

On the other hand, in recent years, inkjet recording devices, particularly recording heads, have been manufactured using semiconductor film forming processes and microfabrication techniques, and smaller and cheaper recording heads are being realized. This results in
For example, a disposable type recording head with an integrated ink tank has also been proposed.

Accordingly, there is a desire for an inkjet recording apparatus that is compact and inexpensive, and that is easier for users to use.

[Problems to be Solved by the Invention] However, miniaturization of such a device requires that the space for the arrangement or operation of the members constituting the device is limited, and that the members themselves are made smaller. As a result, each of the above-mentioned configurations, as well as other configurations of the device and related mechanisms between these configurations, need to be different from those of relatively large devices.

Among such configurations, a configuration has been proposed in which the recording head is rotated around a predetermined axis depending on the thickness of the recording paper used, and the gap between the recording paper and the ejection opening of the recording head is set to an appropriate value. There is. By making this gap appropriate, the position, size, etc. of the pixels formed by the ejected ink droplets can be made favorable.

However, in conventional configurations of this type, cams and the like for rotation are provided on the recording head or carrier side, so the mechanism may be complicated and bulky.

Furthermore, since operating mechanisms such as levers for rotation are often similarly provided on the recording head or carrier side, there is a problem that the operation becomes complicated, especially in small recording devices. was there.

The present invention has been made in order to solve such problems, and its purpose is, for example, to make the rotation axis of the guide shaft that guides the movement of the recording head eccentric,
Inkjet recording allows the recording head to rotate by rotating the guide shaft around this rotation axis, making it possible to adjust the gap between the recording paper and the ejection port from outside the device with a simple configuration. The goal is to provide equipment.

[A Thousand Steps to Solve the Problems] To achieve this goal, the present invention provides a recording head for performing recording by ejecting ink droplets onto recording medium #j, and a recording head that rotatably supports the recording head. a support means, a shaft rotatably engaged with the recording head or a member fixed to the recording head and having an eccentric shaft, and a shaft support member rotatably supporting the eccentric shaft of the shaft; It is characterized by having the following.

[Operation] According to the above configuration, by rotating the shaft around its eccentric axis, the position where this shaft engages with the recording head, etc. changes, and thereby the recording head is rotated and the recording paper ( The gap between the recording medium (recording medium) and the recording head can be adjusted.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external perspective view of an inkjet recording device according to an embodiment of the wooden invention, FIG. 2 is a perspective view of the main parts of the device shown in FIG. 1 excluding the case, etc., and FIG. 3 (A) and CB) are also diagrams mainly showing the paper ejection system of the apparatus shown in FIG.

In FIG. 1, reference numeral 100 indicates an inkjet recording apparatus, and this apparatus 1 (10) is used when it is mounted and used as shown in the same figure, and when it is mounted and used vertically as described later. It is relatively small.

101 is a device case, 102 is an outer cover, and 103 is an inner cover. When not in use, the outer cover 102 is superimposed on the inner M103, making the device 100 compact.

This allows the user to carry the recording device, for example, in a dedicated storage bag.

Furthermore, the outside M 102 can also be used as a paper feed guide for the recording paper 40, as shown in the same figure, and in this case, 10[i in the figure becomes a paper feed port. Furthermore, the outside M 102 can also be used as a paper discharge tray, as will be described later.

In any of the above cases, reference numeral 107 in the figure serves as a paper discharge port.

105 is a position fixing hook of the upper M102, and +04 is an operation key, a display section, etc.

Next, the structure of the main parts of the apparatus will be explained with reference to FIG.

In FIG. C, 1 is a chassis, and a left side plate 1a and a right side plate 1b, which also serve as guides for recording media such as paper, are erected on the rear side. Further, the chassis 1 is provided with a motor mounting hole for rotatably supporting a carrier motor, which will be described later, but is not shown.

lh is a lead arm that supports a lead screw, which will be described later, in the axial and radial directions, and is a bearing part (not shown).
It is pivoted on.

2 is a lead screw, and leads m2a are formed at a predetermined pitch facing the recording range. Furthermore, on the carrier home position side of the lead screw 2, a position i3b for setting a position for performing cap and discharge recovery is formed along a cross section perpendicular to the screw axis. Furthermore, the lead fl42a and the position groove 3b are smoothly continuous due to the introduction if43c.

A shaft 2g is provided at the right end of the lead screw 2, and a shaft is also provided at the left end, which are fitted into bearings provided on the front plate 1c and the lead arm lb, respectively.
It is supported so that it can rotate freely. 3 is the groove 3b mentioned above
, 3c, and is a pulley provided on the shaft of the lead screw 2, and a pulley 3a is provided at the end thereof. A driving force is transmitted from the motor 1l to the pulley 3a via the timing belt l3.

In addition, the shaft 2g on the right end side of the lead screw 2 is slidably engaged with the groove of the guide plate 1c connected to the chassis right side plate 1b and the chassis 1, and is rotated in the thrust direction by the holding part 10a of the leaf spring IO. While being pressed, the shaft 2g further engages with a cam groove of a cam groove plate 5Qa rotatably supported by a shaft provided on the guide plate 1c. Cam groove plate 50a
Interlocking teeth are formed around the leaf spring 10.
By engaging with the ratchet portion 10c, the cam groove plate 50a can be latched at a desired rotational position. As a result, the position of the shaft 2g that engages with the cam groove is determined in the groove of the guide plate 1c, and therefore the lead screw: L-
2 at the right end of the device is determined. This configuration is used for adjusting the gap between the recording head and the platen, which will be described later.

Reference numeral 4 denotes a clutch gear, which is slidably supported in the axial direction with respect to the lead pulley 3, and is engaged in the rotational direction by a part of the key provided on the lead pulley 3, which will be described later in FIG. 2 rotational force is transmitted. A clutch spring 5 is a compression spring that biases the clutch gear 4 in the direction of the lead groove. A regulating member is provided between the clutch gear 4 and the rest boot 3 to prevent the clutch gear 4 from moving within a predetermined range in the axial direction.

A carrier 6 is slidably attached to the lead screw 2. Reference numeral 6a denotes a pressing portion for pressing the clutch gear 4's clutch surface, and is integrally formed on the left side of the carrier. ．． A lead bin 7 is engaged with the lead groove 28 of the lead screw 2, and its pressing force is guided by a guide hole (not shown) in the carrier 6. 8
is a lead bin spring, one end of which is attached to the carrier 6, and the other end of which presses the lead bin 7.

9 is a recording head mounted on the carrier 6, and in this example, 8 is a cartridge that is removably attached to the carrier 6 by integrating a head element 9a for ejecting ink and an ink tank 9b serving as an ink supply source. It has the form of
It is a disposable type that can be replaced when the ink is consumed. Note that an electrothermal transducer or an electromechanical transducer is used as the ejection energy generating element disposed in the head element 9a to apply ejection energy to the ink, but it is possible to implement high-density mounting of ink ejection ports, etc. Due to the fact that the manufacturing process is simple, etc.
The former is preferably used.

A hook 6c is fixed to a part of the carrier 6, and is attached to the recording head 9 when the carrier 6 moves as described later.
This mechanism is used to stably stop at the cap position, etc.

A carrier guide shaft 5l is slidably engaged with a guide bin 6b provided at the rear end of the carrier 6. The guide @5l has an eccentric shaft 5 as described later in FIG.
1a, and these shafts 51a are rotatably supported by side plates 5lb and 51c provided at the ends of the chassis 1. Further, the end of the shaft 51a that is supported by the side plate 51c is fixed to a positioning knob 51d, and the shaft 5l is rotated by engaging a projection provided on the knob 51d with a hole 51e provided in the side plate 51c. The position is determined.

As shown in FIGS. 4(^) and (8), the above-described configuration allows the distance between the recording surface of the recording paper 40 and the ejection port of the head element 9a to be set appropriately depending on the type of recording paper 40. It is for the purpose of That is, by manually rotating the knob 51d, the shaft 51 can be moved to the position where the distance between the shaft 51a and the pin 6b is minimum, as shown in FIG.
As shown in FIG. 4(B), the same distance can be fixed at the maximum position. In response to this, the recording head 9 rotates about the lead screw 2 as a rotation axis, and the recording paper 40 is placed at a position corresponding to relatively thin plain paper (FIG. 4 (A)) or a position corresponding to a comparative example such as an envelope. They are fixed at positions with large intervals (FIG. 4(B)) corresponding to thick recording paper.

However, the above-described configuration is compatible with recording paper during recording. That is, during the ejection recovery process, the recording head 9 is moved to the position of the recovery process system shown at the left end in FIG. At this time, the recording head 9 and the recovery system must always be in a predetermined positional relationship. Therefore, Figure 4 (A
) or (B), the recording head 9 needs to take a fixed position during the ejection recovery process. The configuration for this purpose is shown in FIGS. 5(A) and 5(B).

FIGS. 5(^) and (8) show diagrams corresponding to FIGS. 4(8) and (B), respectively.

In the case of FIG. 5 (8), the shaft 51a and the bottle 6b can be engaged with each other without changing the height of the engagement position between the shaft 51 and the bottle 6b. At this time, in order to maintain the height of the engagement position, the parallel surface of the trapezoidal cam 51g is also engaged with the bin 6b.

In the case of FIG. 5(B), the recording head 9 moves and the bin 6b
When the pin 6b attempts to engage with @51a, the height of the engagement position of the bin 6b changes. Therefore, the shaft 5l has a tapered portion 51.
? The trapezoidal cam 51g is provided with a tapered surface in accordance with this. Ru. As a result, as the height of the engagement position of the pin 6b with the shaft 51 (tapered portion 51f, shaft 51a) changes, the height is maintained.

With the above precautions, when the recording head 9 reaches the position of the ejection recovery system, it is possible to always maintain a predetermined height and therefore a predetermined positional relationship with the recovery system.

Note that the rotationally fixed position of the recording head 9 is 2 as described above.
The present invention is not limited to this, and it is also possible to fix it at an intermediate position to accommodate recording paper of various thicknesses. In this case, the protrusion of the knob 51d and the hole 51e of the side plate 51c
All you have to do is increase the number of engagement positions.

Furthermore, the rotation of the knob 51d is not limited to manual operation; for example, the knob 51d may be rotated using the driving force of a paper feed motor or the like in accordance with the key manual power corresponding to the recording paper used.

Referring again to FIG. 2, reference numeral 1l is a carrier motor made of, for example, a pulse motor, and rotating pins lla are provided in alignment at the lower part of the front and rear surfaces of the carrier motor. (The one on the rear side is not shown) is rotatably attached to a motor attachment hole provided in a recovery system base 50 that is movable on the chassis 1. Of course, the rotating bottle may be provided on the recovery system base 50 and the mounting hole may be mounted on the motor side.

The carrier motor 11 is rotatably attached around the rotation pin lla. llb is a spring support, and is integrally formed with the carrier motor 1l, and is erected in parallel with the motor shaft to receive a motor spring 14, which will be described later. A cylindrical projection is formed in the spring receiving portion, and an end portion of a coiled motor spring l4 is fixed thereto.

12 is a motor pulley, which is fixed to the motor shaft of the carrier motor 11. l3 is the timing belt,
It is stretched between the motor booster 12 and a booster 3a provided on the shaft of the lead screw 2.

The motor spring 14 is a compression spring in the configuration shown in the wooden example, and is attached between one end of the lead arm 1h and the spring receiver llb of the carrier motor 11, thereby allowing the carrier motor 11 to be moved in eight directions in the figure. This applies tension to the timing belt 13.

Reference numeral 15 denotes a set shaft, which is erected on a side plate (not shown) fixed to the base 50, to which means for improving the discharge port formation surface, a cap, and a so-called recovery system mechanism related to discharge recovery are attached.

By the way, as mentioned above, the positional relationship between this recovery system mechanism and the recording head 9 is important. For example, the recording head 9
The positional relationship between the blade and the discharge port surface is important for the blade to perform its function of wiping the discharge port surface well, and the positional relationship between the cap and the discharge port surface is important for the good capping function of the discharge port surface. The spacing between is important. Therefore, it is desirable that the positional relationship between these recovery system mechanisms and the recording head 9 is always kept constant.

On the other hand, the recording head 9 is driven by the lead screw 2 due to the driving force being transmitted through the lead screw 2.
Record while moving along the At this time, recording paper 4
It is clear that it is desirable that the distance between 0 and the ejection opening of the recording head 9 be the same at any position of movement.

Therefore, by adjusting the distance of the recording head 9 to the recording paper,
An adjustment mechanism may be provided that allows the recording head to move parallel to the recording paper, but this adjustment may impair the fixed positional relationship with the recovery system.

Therefore, in the wooden embodiment, the carrier motor 11 and the recovery system base 50 provided with a recovery system mechanism which will be described in detail later are made movable with respect to the chassis 1.

By this movement of the base 50 and the adjustment by the cam groove plate 50a described above, the position of the lead screw 2 is adjusted at both ends, so that the recording head 9 moves parallel to the recording paper 40. The details of the mechanism in the base 50 for this purpose are shown in FIG.

FIG. 6 is a perspective view of the recovery system base 50 taken from the direction opposite to that of FIG. 2, and is partially cut away.

In the figure, 50e is a guide groove member fixed to the side surface of the groove provided on the back side of the base 50, and this member 50g
groove, and a key-shaped guide member 1k fixed to the chassis 1.
By engaging with the guide portion, the moving direction of the base 5θ is regulated, and the base 50 can be prevented from floating up from the chassis 1.

In the above mechanism, as shown in detail in FIG. 2, by rotating the cam plate 50b around the shaft 50d attached to the base 50, the cam surface of the cam plate 50b is rotated to one side of the cam 41j2 of the chassis 1. Press the surface without touching the surface. At this time, the base 50 moves in the direction guided by the member 50e and the member 1k due to the reaction force of the pressing force.

Note that the cam may be configured such that the cam plate is rotated around a predetermined axis by operating a shaft that engages with a predetermined cam groove formed in the cam plate.

Along with this movement, the carrier motor 11 attached to the base 50 and the drive system of the motor l1, that is, the timing belt 13, the booster 3.12, the lead screw 2, etc., and the drive system of the motor l1 attached to the base 50 are also 5. While the recovery system mechanism is moving together, the read screen is activated. −
The position of one end of 2 is adjusted.

On the other hand, the position of the other end of the lead screw 2 is adjusted by rotating the cam groove plate 50a.

With the above adjustment, the lead screw 2 can be made parallel to the recording paper, so that the recording head can move parallel to the recording paper.

Note that this adjustment is performed by an assembly robot during the manufacturing process of the recording device, but this adjustment may also be performed on the user side, for example, during repair or the like after using the device for a long period of time.

Next, with reference to FIG. 2 and FIGS. 7(^) to (c), a means for improving the discharge port forming surface, which is one of the recovery system mechanisms, will be explained.

16 is a blade lever (see FIG. 7(A)), and a boss portion 16a is rotatably attached to a set shaft 15. 16b is an arm portion, and 18c is a hook portion. Reference numeral 17 denotes a blade for wiping the discharge port shaped surface, and it can be made of an elastic member such as silicone rubber or chloroprene (CR) rubber. l8 is the blade axis, and the blade l
7 is clamped at the center parallel to the rotation axis, and is rotatably attached to the blade lever 16. Also,
18a is a rotating piece, which is formed integrally with the blade shaft l8. An ink carrier 19 is made of a hydrophilic porous material (sintered plastic, urethane foam, etc.), and is fixed to the blade lever 16. Note that the blade 17 and the ink carrier 19 are arranged at a position overlapping a cap, which will be described later.

Reference numeral 20 denotes a set lever, which is rotatably attached to the set shaft 15. 20a and 20b are set levers 2
0 is a stop tooth, 20c is a start tooth,
20d is also a rotation tooth, and the tooth thickness of the start i20c is about half that of the other teeth. 20e is an arm part, and by cutting a part of it in the plate thickness direction, a setting surface 20f is formed.
and a reset surface 20g are formed, and the rotating piece 18 of the blade @l8 attached to the blade lever 16
a is fitted and combined to drive it.

2l is a timing gear, which is rotatably attached to the base 50 by a support member (not shown).

As shown in FIG. 7(B), the timing gear 2l has stop teeth 20a.
A stop cam 21a is formed for engaging 20b. In addition, three types of drive teeth 2lb + with some missing teeth,
2lb2. 21b3 is formed, and a cap cam 21c for swinging a cap lever, which will be described later, is formed at a predetermined position. In addition, a piston set cam 21f for pressing the piston of the bomb, which will be described later, is formed as a face cam, and a piston reset cam is formed at a predetermined interval corresponding to the piston set cam 21f.
A cam 21g is integrally formed.

Reference numeral 22 denotes an ink absorber spring, which is fixed at a predetermined position on the base 50, and as shown in FIG.
2b. 23 is an ink absorber, which is made of a hydrophilic porous material like the ink carrier 19 described above. This ink absorber 23 is formed with a wiping portion 23a that the blade 17 mentioned above comes into contact with.
Furthermore, an absorbing surface 23b is formed at the lower part of the absorbing surface 23b, which the ink carrier 19 mentioned above comes into contact with to transfer ink. The absorber holding portion of the ink absorber spring 22 is biased upward with some elastic force, and is locked in a predetermined position by a stopper (not shown). Therefore, when the ink carrier 19 mentioned above makes contact, the ink absorber 23 deflects the ink absorber spring 2z and is displaced downward, thereby ensuring the contact state.

Next, the recovery system unit, which is one of the recovery system mechanisms, will be described mainly with reference to FIGS. 8 and 9.

In FIGS. 8 and 9, 24 is a cylinder;
It has a cylindrical cylinder part 24a and a guide part 24b that guides a piston shaft, which will be described later.
4b has an ink flow path 2 by cutting out a part in the axial direction.
4c is formed. 24d is a cap lever receiver, which is formed so that a lever seal, which will be described later, is fitted therein. Further, 24e is an ink flow path, which opens at a predetermined position within the cylinder portion 24a. Reference numeral 24f denotes a rotating lever, which is formed integrally with the cylinder 24 and is provided with a rotating force by the spring portion 22b of the ink absorber spring 22 described above. A waste ink pipe 24g is formed integrally with the cylinder 24, and its tip is cut into an acute angle so that it can be easily inserted into a waste ink absorber to be described later. 24b is an ink flow path formed within the waste ink pipe 24g.

25 is a cylinder cap, which is pressed onto the end of the cylinder 24. Reference numeral 25a denotes a lever guide, which is disposed at a position facing the cap lever receiver 24d of the cylinder 24 described above.

A piston seal 26 is fitted into the cylinder 24, and its inner diameter is made slightly smaller so as to obtain a predetermined pressure contact with the piston shaft, which will be described later. Further, the sliding force of the piston shaft may be reduced by applying a lubricating coating to the surface.

27 is a piston shaft, and operation shafts 27a. Piston presser 27b. A piston receiver 27C, a connecting shaft 27d, and a guide shaft 27e are formed, and further serve as an ink flow path. 127f is formed along the connecting shaft 27d and the guide shaft 27e. 27g is a rotation stopper, which is formed as a groove in the operating shaft 27a. Further, a bearing portion 27h is provided on the end surface of the operating shaft 27a.

28 is a piston, and the main body forming the inner layer when viewed from the cylinder sliding part side is formed of an elastic porous material. These include foams with single pores (such as sponges) and porous bodies with continuous pores such as continuous microporous materials, but preferably continuous microporous materials, such as open-cell foamed urethane foam, are used. Can be formed. Further, a plurality of continuous pores may exist in a direction crossing the direction of elastic deformation.

The outer diameter thereof is formed to be larger than the inner diameter of the cylinder 24 by a predetermined amount, and when inserted into the cylinder 24, it is in an appropriately compressed state. Also, the outer peripheral surface 28a and the end surface 28b of the piston shaft 27 that comes into contact with the piston presser 27b.
is designed to position the solid layer (skin film) during foam molding of the piston.

Here, even if the member forming the piston body is foamed and communicated, the skin film does not communicate with liquid and maintains airtightness, so the piston 28 fulfills its function. In addition, as long as it does not have a skin film, a film for maintaining airtightness may be separately provided.

42 is a pump chamber. 29 is a piston pressing roller, which is rotatably attached to the end of the piston shaft 27. 30 is a piston return roller, which is similarly rotatably attached to the end of the piston shaft 27. 3l is the axis of these rollers.

32 is a cap lever, and a rotating shaft 32a, an ink guide 32b, and a lever guide 32c are formed. In addition, the tip has a convex spherical sealing surface 32d.
is formed. Further, an engaging portion 32e for engaging with a claw of a cap holder, which will be described later, is provided as a pair of upper and lower members. Further, the ink flow path 32f passes through the inside of the lever from the sealing surface 32d, bends at a right angle halfway, passes through the center of the ink guide 32b, and opens at the end surface thereof. Note that a cutout 32g is provided on the lower side of the ink guide 32b.

33 is a lever seal into which the ink guide 32b is fitted and pressed into the cap lever receiver 24d. 33a is a communication hole, which communicates the notch 32g of the ink guide 32b with the ink flow path 24e.

34 is a cap holder, and a hook 34a that engages with the engaging portion 32e of the cap lever 32 is provided at an opposing position. 34b is an opening for attaching a cap, which will be described later.

Reference numeral 35 denotes a cap, and a cap portion 35a is formed which serves as both a sealing cap for preventing normal ink from drying and a suction cap for sucking ink. A suction port 35b is formed in the cap 35a and opens toward the cap holder 34 through the center of the cap 35.

35c is a flange portion, which prevents the cap from coming off when attached to the cap holder 34. Further, a concave spherical cap seal part 35d having the same IIj ratio as the sealing surface 32 of the cap lever 32 is formed on the flange part 35c, and when the cap lever 32 is pressed, only the central opening is closed. are connected and the others are sealed. In addition, since the seal portions (32d, 35d) are spherical, the cap member has an excellent equalizing function, and even if there is a step on the discharge port forming surface, the step is immediately absorbed and a stable seal is achieved. can maintain its condition.

Now, referring again to FIG. 2, 36 is a paper feed roller for conveying a recording medium such as paper, and is made by applying an elastic paint (urethane resin, acrylic resin, etc.) to the surface of, for example, a drawn aluminum tube. It can be formed by Also,
The roller 36 functions on its outer surface as a platen that regulates the recording surface of the recording medium, and its interior serves as a storage section for waste ink. Reference numeral 37 denotes a waste ink absorbing section provided inside the roller 36, which is a tube made of a thin plastic such as vinyl chloride and filled with an absorbing material such as polyester cotton, so that ink can be absorbed well in the axial direction. Note that the waste ink pipe 24g of the cylinder 24 is inserted into the waste ink absorbing portion 37, but even if the recovery system mechanism moves with the movement of the base 50, the inside of the absorbing portion 37 should be kept to an extent that does not impede the movement. Supported by Furthermore, the m-fibers of the absorbent material themselves are preferably made of a non-liquid-absorbing material such as resin or metal, but may be slightly liquid-absorbing.

Reference numeral 38 denotes a paper press plate made of fluorocarbon resin, carbon fiber mixed material, etc., which is divided into four parts and attached to the chassis 1, as detailed in FIG. Further, a gear 38B is fixed to one end of the shaft 38^ for releasing the pressing force of the paper pressing plate 38, and the other end engages with a bearing 38G that pivotally supports the shaft 38^. The bearing 38c is fixed to the chassis 1. Note that a gear portion of the release lever meshes with the gear 38B, but is not shown here. Reference numeral 39 denotes a paper feed motor, which is connected to the paper feed roller 36 via a speed reduction mechanism with a predetermined ratio.

40 is paper. Recording paper such as film.

Next, the operation of the above configuration will be explained.

First, during normal recording operation, the lead screw 2 rotates via the timing belt 13 due to rotation of the shaft of the carrier motor l1, so the carrier 6 is moved toward the printing digit direction by the lead pin 7 engaged with the lead groove 28 toward the recording paper 40. scanned along. Here, since the carrier motor 11 is biased by the motor spring 14, the tie lever 13 is always arched and good transmission is achieved.

When moving the carrier 6, an inertial force acts upon starting and stopping, but since the weight of the carrier motor 11 absorbs this inertial force, the load applied to the motor spring 14 can be reduced.
The load applied to the rotation of the motor can also be reduced. Further, if an air damper or a hydraulic damper is provided in connection with this spring, noise caused by vibration of the rotor of the motor 11 when the carrier 6 is started or stopped can be reduced. The weight of this mo-yu,
If the weight of the carrier portion and the coefficient of the motor spring damper are appropriately selected, rotor overshoot can be reduced and noise can be reduced.

Next, the operation of this embodiment during non-recording will be explained with reference to FIGS. 10 to 16.

FIG. 10 is a timing chart showing the operation timing of each part, and the operation timing of each part as shown can be determined by the number of pulses applied to the motor 11.

FIG. 11 is a perspective view showing the detailed structure of the above-described clutch latch gear 4 and timing gear 21.
By engaging with h, it slides on the lead screw 2 and rotates together.

Further, the clutch gear 4 is biased toward the carrier 6 by a spring 5, and is normally in a predetermined position by the groove 21 of the lead screw 2 during recording and rotates together with the lead screw 2. When the recording head 9 moves to the home position, the clutch gear 4 is pushed by the carrier 6 and begins to engage with the tie main gear 21.

The clutch gear 4 has a start tooth 4c and a normal drive tooth 4.
c2, and the start tooth 4c and the driving tooth 4c are formed at different positions in the width direction of the clutch gear. In addition, the drive *@4 C 2 is not formed in the same manner all around the gear, but has a portion having a curved surface portion 4b. Furthermore, a collar 4a is formed at the end of the clutch gear 4 over the entire circumference.

As shown in FIG. 7(B), the timing gear 2l is
Start i2lb,, and 2f at different positions! Drive tooth 21bz. 21b3 and these @2lb,
, 2lb2, and 21bs are formed at different positions in the width direction of the gear 2l.

￥S12 figures (^) to (C), and figure 13 (^),
(.B) is a diagram showing the engaged state of the vine latch gear 4 and the timing gear 2l, respectively.

During normal recording, Figure 12 (^) and Figure 13 (A
) is in the engaged state as shown in FIG. However, at this time, the first
In Figure 3 (^), the lead bin 7 is not in this position,
Furthermore, although not shown, a blade l7 and an ink carrier l9 are located above the ink absorber 23.

At this time, the clutch gear 4 rotates as the lead screw 2 rotates, but the clutch gear 4 rotates with the rotation of the lead screw 2.
2lb, is not in the positional relationship to engage (Fig. 13 (^)
reference). For this reason, the tie pointed gear 2l does not rotate, and moreover, the driving tooth 21b2 and the collar 21h at the left end of the tie main gear 21 are in a positional relationship that allows them to come into contact with the collar 4a of the clutch gear 4 with a slight gap. , the tine gear 2l cannot rotate in either direction.

As a result, even if some rotational force or artificial force is applied to the timing gear 21, it will not rotate unexpectedly, and errors in the operating position of the recovery system mechanism can be prevented. can.

When the recording head 9 moves toward the home position and the carrier 6 pushes the clutch gear 4, the positional relationship between the clutch gear 4 and the timing gear 2l is finally as shown in FIG. 13(B).
It becomes as shown in . In this process, start tooth 4cl
and 2lb are in a positional relationship in which they can be engaged (however, at this time, the lead bin 7 is not yet in this position).

Next, as the lead bin 7 moves from the groove 3C to the groove 3b, the clutch gear 4 rotates clockwise in FIG. ) changes sequentially to the states shown in At this time, start I#4C
Until I and 21b engage, the curved surface portion 4b as a non-meshing portion shown in FIG. 11 is in the position closest to and facing the timing gear 21. moves and the other drive teeth do not engage each other first.

As a result, the gear engagement between the clutch gear 4 and the timing gear 2l always starts with the start teeth starting from each other, so that the rotation of the timing gear 2l always starts from the correct position.

As a result, the operation of the recovery system mechanism driven via the timing gear 2l becomes accurate.

Further, there are advantages such as there being no need to increase the mounting precision of the clutch gear 4 and the tying gear 21 so much.

In addition, as shown in FIG. 7(B), the driving teeth 2l whose positions are different among the driving teeth of the timing gear 2l.
b, is a drive tooth that engages when the curved surface portion 4b comes into contact with the timing gear 21 again. That is, if these drive teeth are located at the same position as the normal drive teeth 21b2, they will come into contact with the curved surface portion 4b, so their positions are shifted and the drive teeth are engaged with each other.

Further, while the driving teeth are engaged and the timing gear 2'' is rotating, the hook 6 attached to the carrier 6 is
c slides on the side surface of the timing gear 2l.

Thereby, it is possible to prevent the recording head 9 from leaving the home position due to, for example, the lead bin 7 leaving the full position 3b before predetermined teeth engage with each other. This is because the lead screw rotates twice when the recording head 9 is at the home position and performs a series of recovery processes, so the lead bin 7 may move to the fl 43c.

In addition, in the above example, the series of recovery processing is performed using the lead screw 2.
Although the rotation is performed in this embodiment, the rotation is not limited to this, and any rotation can be set, thereby increasing the degree of freedom in designing the clutch mechanism and the like.

Figures 14 (^) to (D) are explanatory diagrams showing the sequential operating states of the mechanism related to the blade 17, etc., and Figures 15 (A) to (C).
16(A) and 16(B) are explanatory diagrams showing the sequential operating states of the mechanism related to the cap 35. FIGS.
6 is an explanatory diagram for explaining the operation of a mechanism for introducing waste ink into the waste ink storage section 37, and the operation will be explained with reference to these figures and the above-mentioned FIGS. 12 and 13.

First, the carrier 6 moves toward the home position (in the direction of arrow B). At this time, as shown in FIG. 13 (8), the lead bin 7 is engaged with the lead groove 2a, and the ejection port 9C of the head element 9a is connected to the ink carrier 19 (
(see FIG. 14(A)). here,
At this position, all of the ejection energy generating elements of the head element 9a are driven to perform ejection operation (hereinafter referred to as preliminary ejection).
The ink or the like, which has become slightly thickened, is ejected with that ejection force, and the recovery operation based on this preliminary ejection can be completed. Preliminary ejection is also performed at this position, which is periodically performed to prevent the ink in unused ejection ports from increasing in viscosity during normal printing. Note that FIG. 14(A) is a side view of the vicinity of the same position.

Furthermore, as shown in FIG. 13(B), when the lead screw 2 is rotated and the carrier 6 is moved in the B direction, the clutch gear 4 is pressed by the pressing part 6a, and the clutch gear 4 is also moved in the B direction and its start tooth is moved. 4c+ is timing gear 2
It is in a position where it can engage with the start tooth 21b1 of l. Thereafter, the clutch gear 4 rotates in synchronization with the lead screw 2, and the start teeth engage with each other, causing the timing gear 21 to rotate.
rotates in the D direction as shown in FIG. 14(B). On the other hand, since the lead bin 7 has entered the position groove 3b from the introduction groove 30, the carrier 6 does not move even if the lead screw 2 rotates.

When the timing gear 2l rotates in the D direction, the gear part and the gear part of the set lever 20 are engaged, so the set lever 20 starts to rotate in the E direction. Until this point, only the set lever 20 rotates because the hook portion 1 [c of the blade lever 16 is engaged with the claw portion of the chassis.
The blade lever 16 is stopped, but eventually the set surface 20f of the set lever 20 rotates in the F direction while pushing down the encyclical piece 18a of the blade @l8, so the blade 17 rotates in the G direction and closes the discharge port. set in a state capable of engaging with a surface.

When the timing gear 21 further rotates in the D direction, the hook l6 of the blade lever 16 comes off the pawl of the chassis, and the set lever 20 and blade lever 16 also rotate further, causing the blade The ejection port surface of the head 9 is wiped with l7. At this time, the ink liquid etc. removed by wiping the plate 17 is removed only in one direction, that is, only downward in this case, and this removed ink etc. is absorbed or retained in the upper part of the ink carrier 19. . Also, at this time, the ink carrier 19 begins to come into contact with the ink absorber 23. When the set lever 20 further rotates, as shown in FIG. 14(D), the ink carrier 19 and the blade 17 slide against the surface of the wiping portion 23a of the ink absorber 23, so that they are received by the ink carrier 19 during preliminary ejection. The cleaning part 2 removes ink and dust wiped by the blade l7 from the ejection port forming surface.
3a, and the ink droplets adhering to the ejection port surface are also absorbed. Thereby, the ink absorbing ability of the ink carrier 19 can be maintained for a long period of time.

Further, the timing gear 2l rotates in the D direction, but since the stop teeth 20a, 20b of the set lever 20 and the stop cam 21a of the timing gear 2l face each other and come into contact with each other, the encyclical movement of the set lever 20 is restricted. At the same time, since the driving teeth of the timing gear 21 are missing teeth, no rotation force is applied.

As mentioned above, since the blade and the absorber that holds the ink liquid etc. removed by the blade are the same as the ink receiver during preliminary ejection, the device can be made smaller and the time required for these recovery operations can be shortened. can.

When the timing gear 2l further rotates, the cap cam 21c of the timing gear 21 initially restricts the rotating shaft 32a of the cap lever 32c shown in FIG. 8, so the cap rotates as shown in FIG. 35 is in cardiac arrest at a position away from the discharge port surface of the head element 9a. Next, when the timing gear 21 further rotates in the D direction, it comes off from the cap cam 21c, and the regulating state is released. As shown in FIG. 15(B), the circular lever 24f of the cylinder 24 The cylinder 24 is urged by the spring portion 22b of the absorber spring 22 to rotate in the F direction, and the cap portion 35a of the cap 35 comes into pressure contact with the discharge port surface, thereby completing the capping operation. In addition, Fig. 13 (B)
shows a top view at this time. And at this time,
Due to the pressing force of the cap, the seal surface 32d and the cap seal portion 35d are also tightly sealed.

Now, the above is the cleaning and capping operation of the nozzle surface, and normally the apparatus stops here, performs the above operation in reverse according to the input of the next recording signal, and then starts the recording operation.

Next, a suction recovery operation that is performed when the ejection condition is not improved even after preliminary ejection will be described.

When starting this, the timing gear 21 is further rotated from the cap position, and the cap cam 21f is
By pressing the cap lever 32 more, the cap 35 is slightly separated from the discharge port forming surface as shown in FIG. 15(C).

When the timing gear 2l further rotates in the D direction, it comes off again from the cap cam 21f, so the hole and tab portion 35a
comes into pressure contact with the discharge port surface.

Now, regarding the bombing operation, when the recovery operation is started after the above-mentioned sealing cap is completed, the suction operation is started.

At this time, first, the piston set cam 21g pushes the piston pressing roller 29 attached to the piston shaft 27 due to the rotation of the timing gear 2l, so the piston shaft 27
moves in the H direction as shown in FIG. Since there is a skin layer on the contact surface with the presser foot 27b, ink will not leak through the communication holes of the foam material.

Further, the ink flow path 24e of the cylinder 24 is connected to the piston 28.
, the piston 28 is in a movable state only by increasing the negative pressure in the bomb chamber 42. on the other hand,
As shown in FIG. 16(^) after the above-mentioned re-capping, the ink flow path 24e is opened, so that the ink in the head 9 is sucked through the suction port 35b of the cap 35. The sucked ink passes through the ink flow path 32f formed inside the cap lever 32, passes through the communication hole of the lever seal 33,
The ink further flows into the bomb chamber 42 through the ink flow path 24e of the cylinder 24.

When the timing gear 2l further rotates, the cap 35 is moved slightly away from the discharge port surface by the cap cam 21h again, and due to the residual negative pressure in the bomb chamber, the discharge port surface and the cap portion 35
The ink inside a is suctioned to eliminate any remaining ink in these areas.

Next, when the timing gear 2l is rotated in the opposite direction (the direction indicated by the arrow ■ in Fig. 14 (D)), the piston reset cam 21i pulls the piston return roller 30, and the first
6. As shown in FIG. 6(B), move the vist shaft 27 in the direction of arrow J. At this time, since the piston 28 moves after coming into contact with the piston receiver 27c of the piston shaft 27, there is a gap Δ between the end surface 28b of the piston 28 and the piston retainer 27b.
A party arises.

As a result of the movement of the piston shaft 27 and the piston 28, the waste ink sucked into the bib chamber 42 passes through the above-mentioned gap ΔR, passes through the groove 27f of the piston shaft,
The ink passes through the ink flow path 24c of the cylinder 24, and further passes through the waste ink pipe 24g, and is discharged near the center of the waste ink absorber 37. At this time, since the ink flow path 24e of the cylinder 24 is closed by the piston 28 at the beginning of the operation of the piston 28, the waste ink does not flow back toward the cap.

FIG. 17 collectively shows the sequence of the preliminary ejection or suction recovery described above. However, in the figure, the blade l
7 is in a state where wiping is possible (set state. Fig. 14 (B
)), and after wiping, the blade 17 is tilted with respect to the absorber 23 (reset state. Fig. 14 (
8), and then immediately before the set lever 20 returns to its original position, the blade 17 is brought into a set state in which wiping is possible.

Next, with reference to FIGS. 3(^) and (8), the recording paper transport mechanism from recording to paper ejection in the apparatus of this embodiment will be described.

In these figures, reference numeral 38 is a paper press plate made of fluorocarbon resin, carbon fiber mixed material, etc., as described above, and is used to press the recording paper that is being fed (by applying a pressing force, it presses the paper between the ejection port surface of the recording head 9 and the recording paper. have a predetermined interval.

The pressing force of the paper press plate 38 is based on the elastic force of the spring plate 38D. The details of this mechanism are shown in Figure 18 (8) and (
B) Shown in

In FIG. 18(A), the paper pressing plate 38 is applying a pressing force to the paper feed roller. FIG. In this case, the paper holding plate 38 has a D-shape in which a part of the circumference is cut out linearly.
The notch part of N388 that can slide in the direction of rotation is the spring plate 3.
8D, and at this time, the end 38E of the paper presser plate receives a biasing force upward in the figure by the spring plate 38D. As a result, the paper press plate 38 is moved to the shaft 38^
The paper feed roller 36 attempts to rotate clockwise around the paper feed roller 36. On the other hand, FIG. 18(B) shows a state in which the pressing force exerted by the paper pressing plate 38 is released. In this case, the shaft 38A rotates, and the arc portion of the shaft 38A presses the end portion 38F. At this time, the entire spring plate 380 is pushed down in the figure. As a result, the end portion 38E does not receive any biasing force from the spring plate 38D.

When this biasing force is released, the shaft 38^ and the paper press plate 38 are engaged with each other with a certain amount of frictional force, so that the paper press plate 38 does not change its rotational position significantly. As a result, even when it becomes necessary to release the pressing force of the paper presser plate 38, the paper presser plate does not interfere with the movement of the recording head.

Further, the paper pressing mechanism described above is a mechanism that can apply a pressing force that does not prevent the paper feed roller 36 from properly conveying the recording paper within a limited space.

In other words, without using an elastic member in the paper press plate itself,
The pressing force is normally applied to the bottom chassis 1 of the device, which is a dead space.
Since the force is generated by a leaf spring arranged along the top, the degree of freedom in setting the pressing force by adjusting the length of the leaf spring increases, and the paper pressing member can be made smaller.

Note that the leaf spring 38D is attached to the chassis 1 by a fixing member (not shown).

Referring again to FIGS. 3(8) and (B), 60 is a paper ejection roller for ejecting the recorded recording paper, and 6l is a paper ejection roller that applies pressing force to the recording paper being conveyed by the paper ejection roller 60C. This is a spur that regulates the direction in which recording paper is ejected and generates a conveyance force.

Reference numeral 62 denotes a transmission roller that is disposed at an intermediate portion between the paper ejection roller 60 and the paper feed roller 36 and transmits the rotation of the paper feed roller 36 to the paper ejection roller 60. These rotations are transmitted by the frictional force caused by mutual contact.
The paper ejection roller 60 has a cylindrical shape with different radii at both ends and a middle part, and the transmission roller 62 contacts the middle part of the paper ejection roller 60 with a smaller diameter. Therefore, both ends of the recording paper with the larger diameter, which carry the recording paper, rotate at a slightly higher circumferential speed than the circumferential speed of the paper feed roller 36. As a result,
When the recording paper is ejected, the recording paper is conveyed with great force, so that a good recording surface can be formed.

Note that coil springs having appropriate elastic coefficients are used for the rotation shafts of the transmission roller 62 and the spur 6l, respectively. The details of the mechanism will be explained with reference to FIG. 19, taking the case of the Kashiwa car 6l as an example.

In Fig. 19, 61^ is a coil spring and the spur 6
an axis passing through the center of l and extending on both sides of the spur 6
1 and are rotatably engaged with each other. 103B is the rotating shaft 6
This is a shaft supporting member that pivotally supports both ends of the 1A, and is formed as a part of the inner lid 103 shown in FIG. Axial support material 103B
supports @8l^ so that it can slide in its axial direction. 103
G is a regulating member for regulating the movement of the spur 6l in the direction of the rotation axis and in a direction perpendicular thereto, and is provided on both sides of the spur 61. The regulating member 103G is also formed as a part of the inner M103 similarly to the shaft support member 103B.

With the above configuration, the shaft 61^ not only supports the spur 6l, but also obtains the pressing force of the spur 61 against the paper ejection roller 60 by its bending elastic force.

The inner i 103 has a spring member 103^ at its rear end, as shown in FIG. 3(A), and receives a pressing force in the direction of the paper ejection roller due to a reaction with the case 101. The interaction between this pressing force and the elastic force of rotation i61A causes the spur 6 to
1 applies an appropriate pressing force to the paper ejection roller 60.

In addition, when the inner M103 receives the above-mentioned pressing force, the fixing member 10 of the inner M103 as shown in FIG. 3(A)
The engagement between the 3D and the rotating shaft 60G of the paper ejection roller 60 is ensured. As a result, the positional relationship between the spur 6l and the paper discharge roller 60 is always kept constant. Alternatively, by fixing the rotary shaft 60C against a member for hanging, etc., a precise relationship can be maintained regardless of the precision of the inner cover.

In the transmission roller 62, the rotary shaft 62A made of a coil spring has the same function, and the elastic force C of the shaft 62^ provides a contact force to the paper feed roller 36 and the paper discharge roller 60.

As described above, the paper discharge roller 60 has a shape in which the diameter of the middle portion is smaller than that of both ends. The details of this configuration are explained in the 20th
As shown in the figure.

In FIG. 20, 608 is a cover member made of a rubber material, and 600 is a cylindrical core member with a diameter smaller at the middle than at both ends. The paper ejection roller 60 is formed by covering the core member 600 with a vibrator-shaped cover member 60A.

As a result, it is not necessary to integrally mold such a shape with a rubber member or the like, and the paper ejection roller can be obtained relatively easily and at low cost.

Note that the groove portion 60B that is continuously provided at one end of the paper ejection roller 60 can catch the terminal end of the recording paper when it is ejected by the paper ejection roller 60, and prevents the recording paper from being misaligned. This makes it possible to ensure that the paper is ejected reliably.

Note that the shape of the core member SOD is not limited to the above-mentioned shape, and for example, even if it is a shape that is an extension of the shape of the groove portion 60B with a smaller intermediate portion, a cylindrical shape can be obtained by covering it with a rubber material.

Next, the case where the inkjet recording apparatus of this example is used in an upright position will be described with reference to FIGS. 21 and 22.

When the apparatus is used in an upright position, there are cases in which it is used together with an auto feeder 200 as shown in these figures, and cases in which thick paper such as envelopes is fed from a paper feed port on the back side of the apparatus.

In the case of normal recording paper using an auto feeder, the upper i102 can be used as a stacker for #J# recording paper. At this time, as shown in FIG.
The l02 is fixed at a different angle than when used as a paper guide for feeding paper.

The conditions for using the upper i102 as a stacker are as follows.

That is, the position where the ejected recording paper is conveyed through the air to some extent by its own straining strength and comes into contact with the upper M102 or the already stacked recording paper is the upper end H)2 of the upper cover 102.
^ Make sure it is nearby. As a result, only the leading edge of the recording paper slides on the ejected recording paper or the already stacked recording paper, etc., and sliding can be avoided as much as possible, preventing stains on the recording paper from unfixed ink. It can be prevented.

The configuration for this requires that the upper end 102^ be located near the common tangent line of the paper feed roller 36 and the paper ejection roller 6o in the paper ejecting direction, that is, in the case of a wooden example, and that the lower end 1028 be lowered. becomes.

Furthermore, when the trailing edge of the recording paper stopped on the upper end portion 102A is completely discharged, it is lowered at that position and stacked without sliding.

The configuration for this requires the length of the upper M 102 in the paper ejection direction (the length from the upper end 102A to the lower end 102B), and using commonly used recording paper, the paper should be ejected almost horizontally as in the wooden example. When paper is used, its length is 60% to 90%, more preferably 70% to 80%, of the length of the recording paper.

Note that if the configuration of the recording apparatus or the usage conditions are different and the paper ejection direction is different from the above, the length of the stacker may be determined while taking the first requirement above into consideration.

Further, 108 shown in FIGS. 21 and 22 is a roll-in prevention piece, and the recording paper to be stacked is placed in the paper feed port! 08 can be prevented.

(Others) The present invention brings about excellent effects particularly in a bubble jet type recording head and recording apparatus among inkjet recording types.

According to this method, recording density can be increased. This is because high definition can be achieved, and it is expected that the fixing speed will be even slower depending on the recording pattern. As for typical configurations and principles thereof, it is preferable to use the basic principles disclosed in, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740,796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. The electrothermal converter that is
The electrothermal transducer generates thermal energy to cause film boiling on the thermally active surface of the recording head by applying at least one drive signal that corresponds to recorded information and provides a rapid temperature rise above nucleate boiling. This is effective because it can result in the formation of bubbles in the liquid (ink) that correspond one-to-one to this drive signal. The growth of this bubble. The contraction causes liquid (ink) to be ejected through the ejection opening to form at least one drop. It is more preferable to use this drive signal in a pulse form, since the growth and contraction of bubbles can be carried out immediately and appropriately, making it possible to eject liquid (ink) with particularly excellent responsiveness. As this pulse-shaped drive signal, those described in US Pat. No. 4,463,359 and US Pat. No. 4,345,262 are suitable. Furthermore, if the conditions described in US Pat. No. 4,313,124 concerning the invention regarding the temperature increase rate of the heat acting surface are adopted, even more excellent recording can be performed.

The configuration of the recording head includes ejection ports as disclosed in the above-mentioned specifications. Combination configuration of liquid path and electrothermal converter (straight liquid flow path or right-angled liquid flow path). Additionally, US Pat. No. 4,558,333 discloses a 4,t structure in which the heat acting portion is located in a bending region. US Patent No. 44596
The configuration using the specification of No. 00 is also included in the present invention. In addition, JP-A-59-123670 discloses a configuration in which a common slit is used as a discharge part for a plurality of electrothermal converters, and a hole that absorbs pressure waves of thermal energy is disclosed. The effects of the present invention are also effective even with a configuration based on Japanese Patent Application Laid-open No. 138461/1985 which discloses a configuration corresponding to the discharge section. In other words, regardless of the form of the recording head, recording can be performed reliably and efficiently. Furthermore, the present invention can also be applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium that can be recorded by a recording apparatus. Such a recording head may have either a configuration in which the length is satisfied by a combination of a plurality of recording heads, or a configuration as one integrally formed recording head. In addition, even serial type recording heads like the one above can be installed in the main body of the device, making it possible to electrically connect to the main body of the device and supply ink from the main body of the device.Replaceable chip-type recording heads Alternatively, the present invention is also effective when using a cartridge type recording head that is integrally provided with the recording head itself. In addition, regarding the type and number of recording heads installed, for example, in addition to one type that corresponds to single-color ink, there is also a plurality of recording heads that correspond to multiple inks with different recording colors and densities. It may be something that can be done.

In addition, the inkjet recording apparatus of the present invention can be used as an image output terminal for information embedded devices such as computers, as well as as a copying machine combined with a reader or the like, or as a facsimile machine having a transmitting/receiving function. It may be something that you collect. [Effects of the Invention] As is clear from the above description, according to the present invention, by rotating the shaft around its eccentric axis, the position where this shaft engages with the recording head, etc. changes, and thereby the recording The gap between the recording paper (recording medium) and the recording head can be adjusted by rotating the head. As a result, the gap adjustment mechanism between the recording paper and the recording head can be simplified, making it possible to downsize the entire recording apparatus. Furthermore, it becomes possible to rotate the shaft from its end or from the outside of the device, which facilitates the operation for adjusting the gap.

[Brief explanation of drawings]

FIG. 1 is an external perspective view showing an example of an inkjet recording device according to the present invention; FIG. 2 is a perspective view showing the main parts of the device shown in FIG. 1 with the cover removed; Fig. 3 (^) is a perspective view mainly showing the paper ejection system of the device shown in Fig. 1, Fig. 3 (B) is a side view of the drawing shown in Fig. 3 (A), and Fig. 4 Figures (^) and (B) are side views showing an example of the actual travel of the recording head corresponding to the recording paper, respectively, and Figures 5 (A) and (B) are the recording in the home position corresponding to the recording paper, respectively. FIG. 6 is a rear view showing an example of the actual travel of the head; FIG. 6 is a partially cutaway perspective view showing an example of the state in which the base on which the recovery system mechanism is mounted is secured to the chassis; FIGS. ) is a partial perspective view showing an example of an actual journey of the blade and ink carrier part to the recording head C, and FIGS. 8 and 9 are an exploded perspective view and a cross-sectional view showing an example of an actual journey of the suction recovery system to the recording head, respectively. Fig. 10 is a timing chart showing the operation timing of each part according to the embodiment; Fig. 11 is a perspective view showing an embodiment of the clutch mechanism for transmitting driving force to the recovery system mechanism; Figures (A) - (
C) is a side view showing the engagement state of the clutch gear, hook, and timing gear in the clutch mechanism shown in FIG. 11; FIGS. 13(A) and (B) are front views similar to FIG. 12; , Figures 14 (^) to (D) are side views for explaining the sequential operations of the blade and the ink carrier section, and Figure 15 (
A) to (C) are side views for explaining the sequential operations of the cap section, and FIGS. 16 (^) and (8) are side sectional views for explaining the operations of the bomb section for performing suction recovery. , FIG. 17 is a timing chart illustrating the sequence of preliminary discharge or suction recovery processing according to this example (some other embodiments), and FIGS. 18 (A) and (B) show the pressing operation of the paper press plate FIG. 19 is a side view showing an embodiment of the operating mechanism; FIG. 19 is a perspective view showing an embodiment of the supported state of the spur in the paper ejection system; FIG. 20 is a front view showing an example of the actual travel of the paper ejection roller; 21st
The figure is a perspective view showing another example of the usage state of the wood example device, and FIG. 22 is a side sectional view of the state shown in FIG. 21. l...Chassis, 2...Lead screw 2a...Lead groove, 3a...Lead bullion, 3b...Position groove, 3c...Introduction groove, 4...Clutch gear, 5... Clutch spring, 6...Carrier, 6c...Hook, 7...Lead bin, 9...Recording head, 9a...Head chip (discharge element), s b-
...Ink tank portion, 9C...Discharge port, 9d...Discharge port forming surface, 11...Carrier motor, l3...Timing belt, 15...Set shaft, . lt...Blade lever: 1.゜l7...Blade, 19...Ink carrier, 20...Set lever 21...Tie-kungya, 22...Ink absorber spring, 23... Ink absorber, 24... Cylinder, 27... Piston shaft, 28... Piston, 29... Piston pressing roller, 32... Cap holder 34... Cap holder, 35... Cap, 35a---Cap part, 36...Paper feed roller, 37...Waste ink absorber part, 38...Paper presser plate, 40...Recording paper, 50...Base, 5l... Guide shaft, 60... Paper discharge roller, 61... Spur, 62... Transmission roller, 100... Inkjet recording device, 102 103... Top lid,... Inner lid. Figure 3 (B) Figure 4 f Figure 5 Figure 210 Figure 13 Figure 15 Figure 19

Claims (1)

[Scope of Claims] 1) A recording head for performing recording by ejecting ink droplets onto a recording medium, a recording head support means for rotatably supporting the recording head, and the recording head or the recording head. An inkjet recording comprising: a shaft rotatably engaged with a member fixed to a head and having an eccentric shaft; and a shaft support member rotatably supporting the eccentric shaft of the shaft. Device. 2) The inkjet recording apparatus according to claim 1, further comprising a rotating means that engages at an end of the shaft and rotates the shaft. 3) The recording head is a recording head that performs recording by ejecting ink droplets as it moves;
3. The inkjet recording apparatus according to claim 1, wherein the shaft is a guide shaft of the recording head. 4) The ink jet recording apparatus according to claim 3, wherein the recording head support means is a lead screw that engages with the recording head and moves the recording head by rotation thereof. 5) When the recording head or the fixed member is in a position where it can engage with the eccentric shaft of the shaft, the recording head or the fixed member is arranged so that the rotational position of the recording head is always the same. The inkjet recording apparatus according to claim 3 or 4, further comprising an engaging member. 6) The ink jet recording apparatus according to claim 5, wherein the position where the eccentric shaft can be engaged is a position where wiping, capping, and ink suction are performed on the recording head. 7) The inkjet recording apparatus according to claim 1, wherein the recording head of the inkjet recording apparatus ejects ink droplets using heat generated by an electrothermal transducer.