JP2731217B2 - Recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly, to a printing apparatus that performs printing in accordance with scanning movement of a printing head.

2. Description of the Related Art In a recording apparatus of this type, a configuration in which a recording head is moved is such that a carrier on which the recording head is mounted, a wire connected to a part of the carrier, a belt, a wire, or the like is stretched over a moving range of the recording head. And a pulse motor for rotating the pulley.

Instead of using a wire or the like, a part of the carrier is engaged with a thread groove, and a lead screw extending over the moving range of the recording head is used. The lead screw is driven to rotate by a pulse motor to move the carrier. There is also a configuration to perform.

[Problems to be Solved by the Invention] However, in the above-described conventional carrier driving method, there is a problem that the noise accompanying the carrier driving becomes particularly large, for example, when the carrier reverses the moving direction.

This noise is generated when the pulse motor vibrates with the stop of the carrier when the carrier reverses the moving direction and the acceleration from the stop. That is, due to the inertia of the carrier, a force acts to prevent the rotor of the pulse motor from being excited and stopped at a predetermined position, or from being displaced from a predetermined position, and this force and the exciting force oppose each other. The vibration of the roller and the vibration of the entire motor accompanying this occur.

In addition, there is a method of using a DC servomotor or adding a encoder to a pulse motor to perform closed-loop rotation control and scan the carrier, but this method has a small noise at the time of reversal, but the apparatus becomes expensive. There is a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent vibration of a pulse motor by releasing inertia force by a carrier and a recording head acting on the pulse motor. Another object of the present invention is to provide a recording apparatus in which noise generated by a pulse motor is reduced.

Means for Solving the Problems In order to achieve the object, according to the present invention, a carrier for mounting a recording head and moving the recording head, a motor for generating a driving force for moving the carrier, and the motor Transmission means for transmitting the driving force generated to the carrier,
Support means for swingably supporting the motor, and urging means for engaging the motor and the transmission means by urging the motor in a predetermined direction of the swing. .

[Operation] According to the above configuration, the force acting on the rotation of the motor due to the inertia of the carrier can be released by the swing of the motor.

Examples Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall perspective view showing a liquid jet recording apparatus (inkjet printer) according to one embodiment of the present invention, and FIGS. 2 (A) to 2 (C) show discharge port formation of a recording head provided in the printer. FIG. 3 is a partial perspective view for explaining each part of the means for improving the surface, FIG. 3 is an exploded perspective view of the recovery system, and FIG. 4 is a cross-sectional view of the pump unit.

First, in FIG. 1, reference numeral 1 denotes a chassis, and a left side plate 1a and a right side plate 1b which also serve as guides for a recording medium such as paper are erected on the back side. A front plate 1c is provided upright on the right end, and a carrier guide plate 1d is provided upright on the near side.
Reference numeral 1e denotes an elongated hole for guiding the carrier, into which a carrier guide roller described later fits and slides. Chassis 1
Has a motor mounting hole for rotatably supporting a carrier motor described later, but is not shown.

1h is a lead arm that supports a lead screw described later in the axial and radial directions, and a bearing (not shown).
It is pivoted on.

Reference numeral 2 denotes a lead screw, in which lead grooves 2a are formed at a predetermined pitch relative to a recording range. On the carrier home position side of the lead screw 2, a cap groove 3b for setting a cap position and a pump groove 3c for setting a recovery position are formed around a section perpendicular to the axis. The groove 3c is smoothly continuous with the connecting groove 3d. In addition, lead groove
Similarly, 2a and the cap groove 3b are smoothly connected by the introduction groove 3e.

A shaft 2g is provided at the right end of the lead screw 2 and a shaft is also provided at the left end side. The shafts are fitted into bearings provided on the front plate 1c and the lead arm 1b, respectively, and are rotatably supported by them. You. Reference numeral 3 denotes a lead pulley including the grooves 3b to 3e and provided on a shaft of the lead screw 2, and a pulley 3a is provided at an end thereof. Then, a driving force is transmitted from the motor 11 to the pulley 3a via the timing belt 13. In addition, lead screw 2
2g is pressed in the thrust direction by a leaf spring or the like (not shown).

Reference numeral 4 denotes a clutch gear, which is slidably supported in the axial direction by the lead pulley 3 and engages with a rotation stopper (not shown) in the rotational direction to transmit the rotational power of the lead screw 2. Reference numeral 5 denotes a clutch spring, which is a compression spring that urges the clutch gear 4 in the lead groove direction. Although a regulating member for preventing the clutch gear 4 from moving only within a predetermined range is formed between the clutch gear 4 and the lead pulley 3, it is not shown.

Reference numeral 6 denotes a carrier, which is slidably attached to the lead screw 2. Reference numeral 6a denotes a pressing portion for pressing the end face of the clutch gear 4, which is integrally formed on the left side of the carrier. Reference numeral 6b denotes a detection piece for detecting the home position of the carrier 6. Reference numeral 7 denotes a lead pin which is engaged with the lead groove 2a of the lead screw 2 and is guided by a guide hole (not shown) of the carrier 6. Reference numeral 8 denotes a lead pin spring, one end of which is attached to the carrier 6 and which presses the lead pin 7 at the other end.

Reference numeral 9 denotes a recording head mounted on the carrier 6. In this example, a head element 9a for performing ink ejection and an ink tank 9b serving as an ink supply source are integrated to form a cartridge that can be attached to and detached from the carrier 6. It has a disposable type that can be replaced when ink is consumed. Note that, as a discharge energy generating element disposed on the head element 9a to apply discharge energy to ink, an electrothermal converter or an electromechanical converter is used.
The former is preferably used because ink ejection ports and the like can be mounted at high density and the manufacturing process is simplified.

Reference numeral 10 denotes a carrier roller, which is rotatably attached to the rear end face side of the carrier 6 and rotatably engages with the above-described elongated hole 1e of the chassis 1.

Reference numeral 11 denotes a carrier motor composed of, for example, a pulse motor. Rotating pins 11a are provided below the front and rear surfaces in an aligned state. The rotating pins 11a (the rear surface side is not shown). ) Is rotatably mounted in a motor mounting hole provided in the chassis 1. The carrier motor 11 is mounted so as to be rotatable around a rotation pin 11a. A spring receiver 11b is formed integrally with the carrier motor 11 and stands upright in parallel with the motor shaft to receive a motor spring 14, which will be described later. A columnar projection is formed on the spring receiving portion, and an end of the coiled motor spring 14 is fixed.

Reference numeral 12 denotes a motor pulley, which is fixed to the motor shaft of the carrier motor 11. Reference numeral 13 denotes a timing belt, and a pulley 3a provided on the shaft of the motor pulley 12 and the lead screw 2.
It is stretched between. The motor spring 14 is a compression spring in the configuration of the present embodiment, and is mounted between one end of the lead arm 1h and a spring receiver 11b of the carrier motor 11, whereby the carrier motor 11 rotates in the direction A in the figure. If the timing belt 13 is biased to move, tension is applied to the timing belt 13.

Reference numeral 15 denotes a set shaft, which is erected on the left side plate 1a, and is provided with means for improving the discharge port forming surface, and a cap and a mechanism relating to discharge recovery.

Means for improving the ejection port forming surface will be described with reference to FIGS. 1 and 2A to 2C.

Reference numeral 16 denotes a blade lever (see FIG. 2A), and a boss 16a is rotatably attached to the set shaft 15. 16b
Denotes an arm, and 16c denotes a hook. Reference numeral 17 denotes a blade for wiping the discharge port forming surface, which can be formed of an elastic member such as silicon rubber or chloroprene (CR) rubber. Reference numeral 18 denotes a blade shaft, which clamps the blade 17 at the center in parallel with the rotation axis and is rotatably attached to the blade lever 16. Reference numeral 18a denotes a rotating piece, which is formed integrally with the blade shaft 18. Reference numeral 19 denotes an ink carrier, which is formed of a hydrophilic porous material (a plastic sintered body, urethane foam, or the like), and is fixed to the blade lever 16. Note that the blade 17 and the ink carrier 19 are arranged at positions overlapping with caps described later.

Reference numeral 20 denotes a set lever, which is rotatably attached to the set shaft 15. 20a and 20b are stop teeth provided on the set lever 20, 20c is a start tooth, 20d is a rotary tooth, and the thickness of the start tooth 20c is about half the other. 20e
Is an arm portion, a part of which is cut out in the thickness direction to form a set surface 20f and a reset surface 20g, and a rotating piece 18a of a blade shaft 18 attached to the blade lever 16 is fitted. Have been combined to drive this.

Reference numeral 21 denotes a timing gear, which is rotatably attached to the chassis 1.

As shown in FIG. 2 (B), the timing gear 21 has a stop cam 21a formed on a part of the outer periphery thereof for engaging with the stop teeth 20a, 20b of the set lever 20 described above. Also, drive teeth 21b ₁ , 21b ₂ ,... Partially omitted are formed, and cap cams 21c to 21e for swinging a cap lever described later are formed at predetermined positions. In addition, a piston set cam 21f for pressing a piston of a pump described later is formed as a face cam, and a piston reset cam 21g is integrally formed at a predetermined interval corresponding to the piston set cam 21f.

Reference numeral 22 denotes an ink absorber spring, which is fixed at a predetermined position on the chassis 1 and, as shown in FIG. 2 (C), has an absorber holder 22a and a spring 22b for rotating a pump described later. have. Reference numeral 23 denotes an ink absorber, which is formed of a hydrophilic porous material in the same manner as the ink carrier 19 described above. The ink absorber 23 has a wiping portion 23a with which the above-mentioned blade 17 contacts, and further has an absorbing surface 23b with which the above-mentioned ink carrier 19 makes contact and transfers ink. . Note that the absorber holding portion of the ink absorber spring 22 is urged upward with a slight elastic force, and is locked at a predetermined position by a stopper (not shown). Therefore, the ink carrier 19 described above is used.
When the ink comes into contact, the ink absorber 23 is displaced downward by bending the ink absorber spring 22, so that the contact state is ensured.

Next, the recovery system unit will be described mainly with reference to FIG. 3 and FIG.

3 and 4, reference numeral 24 denotes a cylinder;
It has a cylindrical cylinder portion 24a and a guide portion 24b for guiding a piston shaft, which will be described later. The guide portion 24b has an ink flow path 24c formed by cutting a part in the axial direction. Reference numeral 24d denotes a cap lever receiver, which is formed so that a later-described lever seal is fitted therein. Also,
Reference numeral 24e denotes an ink flow path, which is opened at a predetermined position in the cylinder portion 24a. 24f is a rotating lever,
And the turning power is given by the spring portion 22b of the ink absorber spring 22 described above. Reference numeral 24g denotes a waste ink tube, which is formed integrally with the cylinder 24 and whose end is cut at an acute angle to facilitate insertion into a waste ink absorber described later. 24b is an ink flow path formed in the waste ink tube 24g.

Reference numeral 25 denotes a cylinder cap, which is press-fitted into the end of the cylinder 24. Reference numeral 25a denotes a lever guide, which is arranged at a position facing the cap lever receiver 24d of the cylinder 24 described above.

26 is a piston seal fitted into the cylinder 24,
The inner diameter is made slightly smaller so that a predetermined pressure contact force with a piston shaft described later is obtained. Further, a lubricating coating may be applied to the surface to reduce the sliding force of the piston shaft.

Reference numeral 27 denotes a piston shaft, which includes an operation shaft 27a, a piston presser 27b,
A piston receiver 27c, a connecting shaft 27d, and a guide shaft 27e are formed, and a groove 27f serving as an ink flow path is formed on the connecting shaft 27d.
And along the guide shaft 27e. Reference numeral 27g denotes a detent, which is formed as a groove on the operation shaft 27a. Also,
A bearing 27b is provided on an end surface of the operation shaft 27a.

Reference numeral 28 denotes a piston, and a main body forming an inner layer as viewed from the cylinder sliding portion side is formed of an elastic porous body. This includes a foam having a single cell pore (such as a sponge) and a porous body having continuous pores such as a continuous microporous body. Preferably, a continuous microporous body, for example, a continuously foamed urethane foam is used. Can be formed. Further, a plurality of continuous pores may be present in a direction crossing the direction of elastic deformation.
The outer diameter 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 a state of being appropriately compressed. Further, the outer peripheral surface 28a and the piston shaft 2
The end surface 28b which comes into contact with the piston retainer 27b of No. 7 is adapted to position a solid layer (skin film) at the time of foam molding of the piston. Here, even if the member constituting the piston body communicates and foams, the skin film does not communicate with the liquid and the airtightness is maintained, so that 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 room. Reference numeral 29 denotes a piston pressing roller, which is rotatably attached to the end of the piston shaft 27.
Reference numeral 30 denotes a piston return roller, which is similarly rotatably attached to the end of the piston shaft 27. 31 is the axis of those rollers.

Reference numeral 32 denotes a cap lever, on which a rotary shaft 32a, an ink guide 32b, and a lever guide 32c are formed. Also,
A convex spherical sealing surface 32d is formed at the tip end. Further, an engaging portion 32e for engaging a claw of a cap holder described later is provided as a pair of upper and lower members. Further, an ink flow path 32f passes through the inside of the lever from the sealing surface 32d, turns rightward on the way, passes through the center of the ink guide 32b, and opens at an end face thereof. A notch 32g is provided below the ink guide 32b.

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

Reference numeral 34 denotes a cap holder, which is provided at a position facing a hook 34a that engages with the engaging portion 32e of the cap lever 32. 34b is an opening for attaching a cap described later.

Reference numeral 35 denotes a cap, on which a sealing cap 35a for preventing normal drying of the ink is formed, and adjacent thereto, a suction cap 35b for suction is formed. A suction port 35c is formed in the suction cap 35b, the ink flow path is bent in the cap, and the suction port 35c is opened toward the cap holder 34 through the center thereof.

Reference numeral 35d denotes a flange portion, which serves as a stopper when attached to the cap holder 34. Further, the flange portion 35d is formed with a concave spherical cap seal portion 35e having the same curvature as the sealing surface 32d of the cap lever 32, and only the central opening communicates when pressed against the cap lever 32. Others are sealed. Since the seal portions (32d, 35e) have a spherical shape, the cap member has an excellent ecological function, and even when there is a step on the discharge port forming surface (see FIGS. 24 (B) and (C)). The step can be immediately absorbed to maintain a stable sealed state.

Referring again to FIG. 1, reference numeral 36 denotes a paper feed roller for conveying a recording medium such as paper, and is formed by applying an elastic paint (urethane resin or the like) to the surface of, for example, an aluminum drawing tube. be able to. The roller 36 functions as a platen on its outer surface to regulate the recording surface of the recording medium, and its inside serves as a waste ink storage section. Numeral 37 denotes a waste ink absorbing portion provided inside the roller 36, which is formed by filling a thin tube made of plastic such as vinyl chloride with an absorbing material such as polyester cotton so that ink can be absorbed well in the axial direction. The waste ink tube 24g of the cylinder 24 is inserted and fixed in the waste ink absorbing section 37. Further, the fiber itself of the absorbing material is preferably a non-absorbing material such as resin or metal, but may be slightly absorbing.

Reference numeral 38 denotes a paper holding plate, which is attached to the chassis 1.
A paper feed motor 39 is connected to the paper feed roller 36 via a speed reduction mechanism having a predetermined ratio.

 Reference numeral 40 denotes a recording medium such as paper or film.

Reference numeral 41 denotes a detector for detecting the home position of the carrier. In this example, the detector 41 is configured using a transmission type photo interrupter. That is, the position of the carrier can be detected by the detection piece 6b of the carrier 6 blocking the optical path.

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

First, during a normal recording operation, the rotation of the shaft of the carrier motor 11 rotates the lead screw 2 via the timing belt 13, so that the carrier 6 is moved in the print digit direction by the lead pin 7 engaged with the lead groove 2a. Are scanned along. Here, the carrier motor 11 is a motor spring
The timing belt 13 is always tensioned because it is urged by 14, and good transmission is performed.

When the carrier 6 is moved, an inertial force acts at the time of starting and stopping, but the weight of the carrier motor 11 becomes inertial, so that the load on the motor spring 14 is small and the motor load is small. If an air damper or a hydraulic damper is provided in connection with this spring, noise due to vibration of the rotor of the motor 11 when the carrier 6 starts and stops can be reduced. By appropriately selecting the weight of the motor, the weight of the carrier portion, and the coefficient of the motor spring damper, the overshoot of the rotor can be reduced, and the noise can be reduced.

Next, with reference to FIGS. 5 to 9, the operation of this embodiment during non-recording will be described. FIG. 5 is a timing chart showing the operation timing of each unit. The operation timing of each unit as shown can be determined by the number of pulses applied to the motor 11. In addition, FIG.
FIG. 7C is an explanatory view showing the sequential operation state of each part near the home position, and FIGS.
8 (A) to 8 (C) are explanatory views showing sequential operation states of the mechanism relating to the cap 35, and FIGS. 9 (A) and 9 (B) are explanatory views showing sequential operation states of the mechanism relating to the cap 35. FIG. 4 is an explanatory diagram for explaining an operation of a mechanism for introducing waste ink into a waste ink storage portion 37 in a roller 36.

First, the carrier 6 moves in the home position direction (the direction of arrow B) and is detected by the home position detector 41 (this position may coincide with the start position at the time of wrap-up during recording). At this time, FIG.
As shown in FIG. 7, the lead pin 7 is engaged with the lead groove 2a, and the ejection port 9c of the head element 9a is
(See FIG. 7A). here,
At this position, all of the ejection energy generating elements of the head element 9a are driven to perform an ejection operation (hereinafter, referred to as preliminary ejection), and the slightly thickened ink or the like is ejected with the ejection force,
The recovery operation by this preliminary ejection can be completed. Preliminary ejection is also performed at this position, which is performed periodically to prevent the ink in the unused ejection ports from being thickened during normal printing. FIG. 7A is a side view of the periphery of the same position.

Further, as shown in FIG. 6 (B), when the lead screw 2 is rotated to move the carrier 6 in the B direction, the clutch gear 4 is pressed by the pressing portion 6a, and is similarly moved in the B direction to move the timing gear 21. Of the drive teeth 21b. Since the clutch gear 4 rotates in synchronization with the lead screw 2, the timing gear 21
It rotates in the direction D as shown in FIG. On the other hand, since the lead pin 7 enters the cap groove 3c from the introduction groove 3e, the carrier 6 does not move even if the lead screw 2 rotates.

When the timing gear 21 rotates in the direction D, the gear portion and the gear portion of the set lever 20 mesh with each other, so that the set lever 20 starts rotating in the E direction. Until this time, since the hook 16c is engaged with the claw of the chassis, only the set lever 20 is rotated, and the blade lever 16 is stopped. While pressing down the rotating piece 18a of the blade shaft 18
Therefore, the blade 17 rotates in the direction G and is set in a state capable of engaging with the discharge port forming surface.

When the timing gear 21 further rotates in the direction D, the set lever 20 and the blade lever 16 further rotate to clean the discharge port forming surface of the head 9 as shown in FIG. 7 (C). At this time, the ink liquid or the like removed by wiping the blade 17 is removed only in one direction, that is, only in the lower piece in this case, and the removed ink liquid and the like are removed from the ink carrier.
Absorbed or retained at the top of 1a. At this time, the ink carrier 19 starts to come into contact with the ink absorber 23.
When the set lever 20 further rotates, as shown in FIG. 7D, the ink carrier 19 and the blade 17 slide on the surface of the wiping portion 23a of the ink absorber 23 and are received by the ink carrier 19 at the time of preliminary ejection. The ink, dust and the like wiped by the blade 17 from the ejection port forming surface are received by the wiping unit 23a, and ink droplets adhering to the ejection port forming surface are also absorbed. Thereby, the ink absorption capacity of the ink carrier 19 can be maintained for a long time.

Further, the timing gear 21 rotates in the direction D. However, since the stop teeth 20a and 20b of the set lever 20 and the stop cam 21a of the timing gear 21 face and contact with each other, the rotation is restricted and the timing Since the drive teeth of the gear 21 are missing teeth, no rotational force acts.

As described above, since the blade and the absorber holding the ink liquid and the like removed by the blade are the same as the ink receiver at the time of preliminary ejection, it is possible to reduce the size of the apparatus and shorten the time for these recovery operations. it can.

When the timing gear 21 further rotates, the cap cam 21c initially restricts the rotation shaft 32a of the cap lever 32c, and therefore, as shown in FIG. 8A, the cap 35 forms the discharge port of the head element 9a. Stopped at a distance from the surface. Next, when the timing gear 21 is further rotated in the D direction, the cap gear 21c is disengaged from the cap cam 21c, so that the restriction state is released. As shown in FIG.
The rotation lever 24f of 24 is urged by the spring portion 22b of the ink absorber spring 22, the cylinder 24 rotates in the F direction, the closed cap 35a of the cap 35 comes into pressure contact with the ejection port forming surface, and the cap operation is started. finish. FIG. 6B shows a top view at this time. At this time, the sealing surface 32d and the cap seal portion 35e are also tightly sealed by the pressing force of the cap.

Well, the above is the nozzle surface cleaning and cap operation,
Usually, the operation is stopped here and the above operation is performed in reverse according to the input of the next recording signal, and the recording operation is started.

Next, a description will be given of a suction recovery operation performed in a case where the ejection state is not improved even by the preliminary ejection.

When this is started, the timing gear 21 is further rotated from the cap position, and the cap lever 21 is pressed by the cap cam 21b to weaken the cap 35 away from the discharge port forming surface as shown in FIG. 8 (C). .

Next, since the lead pin 7 passes through the connection groove 3d and moves to the pump groove 3c, the carrier 6 moves in the B direction by a predetermined amount (the distance between the cap groove and the pump groove).

When the timing gear 21 further rotates in the direction D, it comes off the cap cam 21d again, so that the cap 35 is pressed against the discharge port forming surface. At this time, since the recording head 9 is moving, the ejection port forming surface is capped by the suction cap 35b (see FIG. 6C).

In the present embodiment, as shown in FIG. 6, the ejection port 9c is biased toward the recording area with respect to the ejection port forming surface, and during normal cap without suction, as shown in FIG. 6 (B). Since the entire surface of the cap 35 completely faces the discharge port forming surface, the pressure on each lead portion of the cap 35 decreases.
However, in this case, since it is only necessary to maintain the airtightness with the outside air, there is no problem in preventing drying, and the gap can be sealed with a pressing force of about 10 g. Further, there is an advantage that since the collapse of the rib portion is small, the internal volume of the cap is only slightly reduced and the ink meniscus does not recede at the time of capping.

Further, as shown in FIG. 6 (C), the cap at the time of the recovery process usually has the cap portion removed from the discharge port forming surface.
The pressure is applied only to the rib portion of the recovery cap, and the sealing performance is improved, and thus, the prevention of leakage due to negative pressure is ensured.
At this time, even if the meniscus retreats due to the decrease in the internal capacity of the cap due to the cap, no problem occurs because the meniscus is restored by the suction operation.

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

At this time, first, the piston set cam 21f pushes the piston pressing roller 29 attached to the piston shaft 27 by the rotation of the timing gear 21, so that the piston shaft 27 moves in the H direction as shown in FIG. 9 (A). I do. And the piston
28 is pressed by the piston presser 27b and moves in the H direction, and the pump chamber 42 is in a negative pressure state. Since there is a skin layer on the outer periphery of the piston 28 and the contact surface with the piston retainer 27b, the ink does not leak through the communication hole of the foam material.

Further, since the ink flow path 24e of the cylinder 24 is closed by the piston 28, the piston 28 is in a movable state only by increasing the negative pressure of the pump chamber 42. On the other hand, as shown in FIG. 9 (A), the ink flow path 24e is opened after the above-mentioned re-capping, so that the cap 3 is closed as shown in FIG.
The ink of the head 9 is sucked from the suction port 35c of No. 5. The sucked ink passes through the ink passage 32f formed inside the cap lever 32, passes through the communication hole of the lever seal 33,
Further, through the ink passage 24e of the cylinder 24, the pump chamber 4
Flow into 2.

When the timing gear 21 further rotates, the cap 35 is again slightly separated from the discharge port forming surface by the cap cam 21e, and the ink in the discharge port forming surface and the suction cap 35b is sucked by the remaining negative pressure in the pump chamber, and these portions are sucked. Eliminate ink residue.

Next, when the timing gear 21 is rotated in the reverse direction (the direction indicated by the arrow I in FIG. 7D), the piston reset cam 21g pulls the piston return roller 30, and as shown in FIG. 9B. Then, the piston shaft 27 is moved in the direction of arrow J. At this time, since the piston 28 moves after the piston receiver 27c of the piston shaft 27 contacts, the end face 2 of the piston 28
A gap Δl is generated between 8b and the piston presser 27b.

The waste ink sucked into the pinch chamber 42 by the movement of the piston shaft 27 and the piston 28 passes through the gap Δl described above, passes through the groove 27f of the piston shaft, and passes through the ink flow path 24c of the cylinder 24. Then, the waste ink is discharged to the vicinity of the center of the waste ink absorber 37 through the waste ink tube 24g. In addition,
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 backward in the cap direction.

FIG. 10 shows another embodiment of the mounting method of the carrier motor 11 shown in FIG. In the figure, reference numeral 50 denotes an elastic member made of rubber or the like.
Has a hole into which is inserted. As a result, the rotation pin 11a is rotatably attached to the motor mounting hole of the chassis 1 via the elastic member 50.
It becomes rotatable about a as a rotation axis.

As a result, the vibration of the motor transmitted to the chassis and the like is absorbed by the elastic member 50, and the noise due to the vibration of the motor is reduced.

FIG. 11 shows another embodiment in which the carrier motor 11 is urged in a predetermined direction and the timing belt 13 is stretched. In the figure, reference numeral 51 denotes a damper filled with gas or oil, one end of two relatively movable parts of which is attached to a spring receiver 11b, and the other end is attached to one end of a lead arm 1h. And inserted into the spring 14.

Thereby, the movement of the carrier motor 11 rotating around the rotation pin 11a can be quickly attenuated in order to release the inertial force at the time of starting and stopping the carrier.

FIGS. 12A and 12B show another embodiment of the positional relationship between the lead screw 2 and the carrier motor 11. FIG. In this example, when the apparatus is placed horizontally as shown in FIG. 3A, a positional relationship is set such that the rotation center of the carrier motor 11 is located on a line 45 ° from below the rotation center of the lead screw 2 vertically. Configure.

As a result, even when the recording apparatus is used upright as shown in FIG. 3B, the force acting on the timing belt 13 due to the weight of the carrier motor 11 is equal to that when the recording apparatus is placed horizontally, and Irrespective of this, a constant force always acts on the belt 13.

FIG. 13 shows still another embodiment of the embodiment shown in FIG. In the figure, reference numeral 52 denotes a balancer attached to the case of the carrier motor 11 with an arm. With this configuration, the difference in the force acting on the belt 13 due to the weight of the motor 11 can be absorbed and made constant due to the difference in attitude of the device described above, and the motor 11 and the lead screw 2 can be arranged flexibly. It becomes possible.

In this way, by always keeping the force acting on the timing belt 13 by the weight of the motor 11, the spring 14 for finally applying a predetermined tension to the belt 13 is
There is no need to have a large elastic force capable of coping with any change in posture of the device.

Although the configuration for driving the carrier according to the present invention in the above-described embodiment has been described with respect to the ink jet recording head, it is apparent that the recording head is not limited to the ink jet type.

Similarly, the structure of the present invention for transmitting the driving force to the carrier is not limited to the lead screw, and it is needless to say that a wire, a belt, or the like can be used.

[Effects of the Invention] According to the present invention as apparent from the above description, the force acting on the rotation of the motor due to the inertia of the carrier can be released by the oscillation of the motor.

As a result, generation of vibration in the motor due to inertia when the carrier moves and stops can be prevented, and noise caused by the motor can be reduced.

In addition, an inexpensive and easily controllable pulse motor can be used as a carrier motor, which can be controlled in an open loop, and a simple structure of a carrier driving mechanism can realize a recording device with a small carrier inversion sound. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an ink jet printer according to the present invention, FIGS. 2 (A) to 2 (C) are partial perspective views showing an embodiment of a blade and an ink carrier portion for a recording head, FIG. 4 and FIG. 4 are an exploded perspective view and a cross-sectional view, respectively, showing an embodiment of a suction recovery system for a recording head. FIG. 5 is a timing chart showing operation timings of respective parts according to the embodiment. FIGS. 7 (A) to 7 (D) are plan views for explaining the positional relationship between the recording head and members used for the processing during preliminary ejection, capping, and suction recovery. FIGS. 8 (A) to 8 (C) are side views for explaining the sequential operation of the cap and the ink carrier section, and FIGS. 9 (A) and 9 (A) are side views for explaining the sequential operation of the cap section. B) Suction recovery FIG. 10 is a side sectional view for explaining the operation of the pump unit for performing the operation, FIG. 10 is an exploded perspective view showing another embodiment of mounting the carrier motor shown in FIG. 1, and FIG. 11 is an embodiment shown in FIG. FIGS. 12A, 12B, and 13 are perspective views showing another embodiment of a configuration for applying tension to the timing belt, and FIGS. 12A, 13B and 13 similarly show another embodiment of a configuration for applying tension to the timing belt. It is a schematic side view. DESCRIPTION OF SYMBOLS 1 ... Chassis, 1h ... Lead arm, 2 ... Lead screw, 3 ... Lead pulley, 6 ... Carrier, 9 ... Recording head, 11 ... Carrier motor, 11a ... Rotating shaft, 11b ... Spring support, 12 Motor pulley, 13 Timing belt, 14 Spring, 50 Elastic member, 51 Damper, 52 Balancer.

Claims (8)

(57) [Claims] A carrier for mounting the recording head and moving the recording head; a motor for generating a driving force for moving the carrier; and transmitting a driving force generated by the motor to the carrier. Transmitting means, supporting means for swingably supporting the motor, and urging means for urging the motor and the transmitting means by urging them in a predetermined direction of the rocking. A recording device characterized by the above-mentioned. 2. The apparatus according to claim 1, wherein said supporting means is configured such that a rotating shaft disposed at a position deviated from a rotating shaft position of said motor in a fixed portion of said motor is rotatably supported. 2. The recording apparatus according to claim 1, wherein: 3. The recording apparatus according to claim 1, wherein said urging means is a coil spring. 4. A recording apparatus according to claim 1, wherein said motor comprises a pulse motor. 5. The apparatus according to claim 1, wherein said transmission means comprises a lead screw engaged with said carrier, and a belt means for transmitting rotation of said motor to said lead screw. The recording device according to claim 1. 6. A line connecting the rotation center of the lead screw and the rotation center of the motor forms an angle of about 40 degrees to about 50 degrees with respect to a vertical direction when the recording apparatus is placed horizontally. The recording apparatus according to claim 5, wherein 7. The recording apparatus according to claim 1, wherein the motor includes a balancer at a fixed portion of the motor. 8. The recording apparatus according to claim 1, wherein said recording head has an ink discharge port.