JPH05338310A - Recorder - Google Patents

Abstract

PURPOSE:To prevent switching timing from shifting by enabling reversible switching to be carried out by same directional rotation of a driving source by a method wherein first to third rotary members are used and by transmission and cut off of the driving force, a screw is reversively rotated by rotation in the same direction of the driving source to reciprocate a carriage. CONSTITUTION:A main gear 11 is borne rotatively with a base frame and fixed to a shaft 12 connected to a motor 15. A reversal gear 14 is, in a freely mating with manner, provided to the main gear 11. A carriage driving screw 13 having a screw gear 13a always mating with the reversal gear 14 is arranged in opposition to a carriage. When the main gear 11 is always rotated in the direction J and the screw gear 13a is mated, the screw 13 is rotated in the direction K to transfer the carriage in the direction P. When the reversal gear 14 is mated to the main gear 11, the reversal gear 14 is rotated in the direction L to rotate the always mated screw gear 13a in the direction M. Therefore, the screw 13 is rotated in the direction M to transfer the carriage in the direction Q.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a serial type recording apparatus for performing recording by reciprocating the recording means in parallel with a recording material, and more specifically, a recording apparatus for performing reciprocating operation of the recording means by the same driving source. Regarding

[0002]

2. Description of the Related Art Conventionally, in a small serial type recording apparatus for recording by reciprocating a recording head in parallel with a recording sheet, the reciprocating operation of the recording head and the recording sheet conveying operation are carried out by the same motor. As a typical configuration, a spiral groove is independently provided in the rod-shaped member, and a forward groove and a backward groove are provided, and both ends of the groove are connected. A member protruding from a carriage carrying a recording head is inserted into the spiral groove, and the carriage is reciprocally moved by rotating the rod-shaped member in the same direction to perform recording. In many cases, the recording operation is limited to the forward or return operation, and the operation process when the carriage returns is distributed to the recording sheet conveying operation in many cases.

[0003]

However, in the above-mentioned conventional structure, when the forward groove and the return groove are formed on the same shaft, the metal shaft is manufactured by cutting, so that the manufacturing cost becomes high. It is also conceivable to manufacture it by injection molding using a mold, but in this case, the only method is to make the mold into a radial split shape, and burrs that occur on the split surface cannot be avoided. Since the burr interferes with stable sliding of the carriage, it has not yet been put to practical use. Regarding the conveyance of the recording sheet, a method of transmitting the backward movement operation of the carriage to the cam member to operate the conveying roller is generally used, but in this case, the recording operation cannot be speeded up. Increasing the number of rotations of the motor in order to forcibly increase the speed causes problems such as noise generation and durability.

The present invention is to solve the above-mentioned problems of the prior art. The object of the present invention is to provide the screw by rotating the drive source in the same direction without providing the screw with a plurality of grooves as in the prior art. It is an object of the present invention to provide a recording apparatus that does not cause a shift in the switching timing when the recording means is reciprocally moved by rotating in the forward and reverse directions and the rotation of the screw is switched between the forward and reverse directions.

[0005]

A typical means according to the present invention for solving the above-mentioned problems is a recording means for recording on a recording material, and a recording medium conveying path for the recording means. A rotating body rotatable in forward and backward directions for reciprocating along the direction, a driving source rotatable in one direction, a first rotating member for transmitting a driving force from the driving source, A second rotating member that can be in a state in which the driving force is transmitted from the one rotating member and a state in which the driving force is not transmitted,
From the first rotating member, a third rotating member that is connected to the second rotating body and can be in a state in which the driving force is transmitted from the first rotating member and a state in which the driving force is not transmitted. A path for transmitting the driving force of the first rotating member as a positive direction rotating force to the rotating body via the third rotating member, and the driving force from the first rotating member via the second rotating member and the third rotating member. A path for transmitting a rotational force in the opposite direction to the rotating body,
When switching between the forward rotation transmission path and the reverse rotation transmission path of the recording means, a restriction means for restricting movement of the recording means to a region where a shift timing occurs. Is provided to configure the recording apparatus.

[0006]

With the above-mentioned means, the rotating body is rotated in the forward and reverse directions by transmitting and shutting off the driving force of the first rotating member, the second rotating member and the third rotating member even if the drive sources rotate in the same direction. The recording means can be reciprocated along the conveyance path of the recording medium. Further, when the rotating body switches the rotation direction, the moving area of the recording means is regulated by the regulating means so that the recording means does not move to the area where the switching timing of the rotating body is deviated.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention to which the above means is applied will be described with reference to FIGS. 1 is a plan view of the recording apparatus, FIG. 2 is a right side view, and FIG. 3 is a left side view.

In the figure, reference numeral 1 is a base frame forming the main body of the apparatus, and a carriage 3 having a recording head 2 constituting a recording means mounted on the frame 1 moves in the directions of arrows P and Q in FIG. It is possible to install. The recording head 2 in this embodiment is an inkjet head that ejects ink in response to a recording signal. That is, the recording head 2 has a fine liquid discharge port (orifice), a liquid passage, and an energy acting portion provided in a part of the liquid passage, and energy for generating droplet forming energy that acts on the liquid in the acting portion. Equipped with generating means. As the energy generating means for generating such energy, a recording method using an electromechanical transducer such as a piezo element, an energy generating means for irradiating electromagnetic waves such as a laser to generate heat, and ejecting droplets by the action of the heat generation And a recording method using an energy generating means for heating the liquid by an electrothermal converter such as a heating element having a heating resistor to eject the liquid. Among them, a recording head used in an inkjet recording method for ejecting a liquid by heat energy has a high density of liquid ejection ports (orifices) for ejecting recording liquid droplets to form ejection liquid droplets. Therefore, it is possible to record at high resolution. Among them, the recording head using the electrothermal converter as the energy generating means can easily be made compact, and has the advantages of the IC technology and the microfabrication technology, which have been remarkably improved in the technology and the reliability in the recent semiconductor field. This is advantageous because it can be used in two parts, high-density mounting is easy, and the manufacturing cost is low. Reference numeral 4 denotes a set lever mounted rotatably around a hole 3a formed in the carriage 3 for fixing the recording head 2 to a flexible cable 6 for connecting it to a drive circuit board (not shown). It is a member of.

The carriage 3 is a base frame 1
1 is supported by two sliding shafts 5a and 5b fixed to FIG.
It is configured to be slidable in the directions of arrows P and Q. Then, the carriage 3 enters a groove 13b (see FIG. 5) formed in a screw 13, which is a rotating body described later, and the rotational movement of the screw 13 is indicated by arrows P and Q in FIG.
A protruding pin 22 (see FIG. 5) for converting into a linear movement in the direction is fixed.

A platen 7 also has a function as a guide for a recording sheet, which is a recording medium. The feed roller 8 for feeding the recording sheet is rotatably supported by the base frame 1 and the right side plate 10, and a gear portion 8a is formed at a predetermined position. A rubber ring 9 is attached to the center of the feed roller 8a, and a pinch roller 23 is provided below each rubber ring 9 so as to face each other.
Pressure is applied to the rubber ring 9 via. The recording sheet is inserted between the rubber ring 9 and the pinch roller 23, and is conveyed according to the rotation amount of the feed roller 8.

FIG. 2 shows the right side surface from which the above-mentioned right side plate 10 is removed. In FIG. 2, 11 is a main gear which is a first rotating member, which is fixed to a shaft 12 and the shaft 12 is rotatably supported by the base frame 1. Reference numeral 14 is a reversing gear which is a second rotating member, and is rotatably supported by a shaft protruding from the base frame 1. 13 is a screw, and the right end portion thereof is a gear portion 13 which is a third rotating member.
a is integrally formed. The reversing gear 14 and the screw gear 13a are always in mesh with each other, but the main gear 11 and the reversing gear 14 or the screw gear 13a are configured to intermittently transmit power by a mechanism described later.

FIG. 4 shows a side surface except the left side plate 16 in FIG. 3, 15 is a DC motor as a drive source,
A worm gear 21 is press-fitted and fixed to the motor shaft. A disc-shaped encoder slit 21a is integrally formed at the tip of the worm gear 21, and is inserted into the concave groove of the ejection signal detector 19. Reference numeral 17 denotes a wheel gear, which is similarly fixed to the shaft 12 that fixes the main gear 11 and is always in mesh with the worm gear 21. The ejection signal detector 19 is a transmissive photo detector,
It is provided on the PCB 18, and at the same time, a recording start signal detector 24 (transmission type photo detector) described later is also provided on the PCB 18. Reference numeral 20 is a flat cable for connecting the PCB 18 and a drive circuit (not shown).

Further, as shown in FIG. 5, the base frame 1
As shown in FIG. 5, restricting members 1a and 1b that constitute restricting means are attached to the inner surfaces of both side walls. The restricting members 1a and 1b restrict the moving area of the carriage 3, and will be described later when the carriage 3 moving in the arrow P (or arrow Q) direction is reversed in the arrow Q (or arrow P) direction, for example. Even when the normal reversing position is passed by the backlash of the gears, the side wall of the carriage comes into contact with the regulating member 1b (or the regulating member 1a) to regulate the movement of the carriage 3.

(Power Transmission System for Driving Carriage) Next, a power transmission system for reciprocating the carriage 3 will be described. FIG. 6 is a perspective view schematically showing a power transmission system relating to the reciprocating drive of the carriage. The DC motor 15 which is a drive source always rotates in one direction when energized. As a result, the wheel gear 17 is moved through the worm gear 21 through the arrow J in FIG.
The main gear 11 also rotates in the J direction via the shaft 12 in the same manner.

As described above, when the power of the main gear 11, which is constantly driven to rotate in the J direction, is transmitted directly from the main gear 11 to the screw gear 13a by the mechanism described later, the screw 13 moves in the direction of arrow K in FIG. The carriage 3 moves in the direction of arrow P at this time. On the other hand, when power is transmitted from the main gear 11 to the reversing gear 14, the reversing gear 14 rotates in the direction of arrow L in FIG. 6 because the reversing gear 14 and the screw gear 13a always mesh with each other as described above. As a result, the screw 13 rotates in the direction of arrow M in FIG. 6, and the carriage 3 moves in the direction of arrow Q at this time.

Next, referring to FIGS. 7 to 9, the main gear
The shapes of 11, the reversing gear 14, and the screw gear 13a will be specifically described. FIG. 7 is an explanatory diagram of the main gear 11. The gear 11 is divided into three facing portions, namely, a facing portion with the reversing gear 14, a facing portion with the screw gear 13a, and a facing portion with the feed roller gear 8a. First, a portion facing the screw gear 13a includes a gear portion 31 and cam portions 30 and 32 at both ends thereof. Although the number of teeth of the gear portion 31 is set to 18 in this embodiment, this value is determined by the number of teeth of the reversing gear 14 and the screw gear 13a, and how many times the screw 13 is driven to rotate.

Next, the portion facing the reversing gear 14 is similarly composed of a gear portion 34 and cam portions 33 and 35 at both ends thereof, and is set to have the same shape as the portion facing the screw gear 13a.
The difference is that the cams 33 and 35 are provided at the respective ends, that is, the reversing gear 14 to the screw gear 13a described later.
It is provided at a position facing the toothless portion (40 or 42 in FIGS. 8 and 9). The portion facing the feed roller gear 8a will be described later.

FIGS. 8 (A) and 8 (B) are explanatory views of the reversing gear 14, in which a full circumference tooth portion 38 having full circumference teeth and a partially toothless portion (3) are shown.
Tooth) 40 and toothed portion 39. As described above, the toothless portion 40 is in a position facing the cam portions 33 and 35 of the main gear 11. Further, the teeth of the full-circumferential tooth portion 38 and the toothed portion 39 are set so as to be out of phase with each other by half a tooth α in the rotational direction. FIG. 9 (A),
(B) is an explanatory view of the screw gear 13a. Incidentally, FIG.
9B is a cross-sectional view taken along the line AA of FIG. This gear 13
Reference numeral a denotes a toothed portion 41 having a full-circumferential tooth portion 43 meshing with the reversing gear 14 and a partially toothless portion (three teeth) 42 like the reversing gear 14.
It is composed of The toothless portion 42 is provided at a position facing the cam portions 32 and 30 of the main gear 11.

Next, a specific operation will be described with reference to FIG. 10 (A) to 10 (D) are explanatory views limited to the movement of the reversing gear facing portion of the main gear 11 and the reversing gear 14 in order to facilitate understanding of the operation. FIG. 10 (A) shows the cam of the main gear 11. The part 35 shows the state where the part 35 has entered the toothless part 40 of the reversing gear 14. At this time, no rotational force is transmitted to the reversing gear 14, and even if the main gear 11 rotates in the direction of arrow J, the reversing gear 14 stops. is doing. Next, when the main gear 11 further rotates in the direction of arrow J, the tooth portion 34a provided on the main gear 11 meshes with the tooth portion 14a of the reversing gear 14 as shown in FIG. It is driven to rotate in the L direction.

In FIG. 10C, the reversing gear 14 is still indicated by the arrow L.
It is driven to rotate in the direction. As described above, when the teeth of the main gear 11 are set so that the tooth portions 34b are too meshed,
As shown in FIG. 10 (D), after the reversing gear 14 makes one rotation, the cam portion 33
Enters the toothless portion 40 and stops the rotation of the reversing gear 14,
And lock it. The same operation is performed by the mutual transmission operation between the screw gear facing portion of the main gear 11 and the screw gear 13a. Further, since the toothed portion 38 (see FIG. 8) of the reversing gear 14 and the screw gear 13a are constantly in mesh with each other, one rotation operation of the reversing gear 14 is transmitted to the screw gear 13a, and the screw 13 makes one rotation.

Here, the reverse gear in the main gear 11
The facing portion with 14 and the facing portion with the screw gear 13a are shown in FIG.
As shown in Fig. 11, the phase is set to be substantially 180 ° out of phase (actually, the main gear at the position of the reversing gear 14 and the screw gear 13a as shown in Fig. 11 with respect to 180 °.
The phase is further offset by the angle θ to the center of 11),
In the state of FIG. 10 (D), the positional relationship between the screw gear 13a and the portion facing the screw gear is in the state of FIG. 10 (A).

However, in FIG. 6, (1) When the main gear 11 rotates 0 ° to 180 °, the reversing gear 14 makes one rotation in the direction of the arrow L, and the screw gear 13a passes through the reversing gear 14 and the arrow M. Make a full turn in the direction. (2) When the main gear 11 rotates 180 ° to 360 °, the screw gear 13a makes one revolution in the arrow K direction, and the reversing gear 14 makes one revolution in the arrow N direction via the screw gear 13a.

When the state is switched from (1) to (2) and (2) to (1), the cam portions 32 and 35 are accurately aligned with the toothless portions of the reversing gear 14 and the screw gear 13a. When inserted, the cam portions 30 and 33 enter the toothless portions to fix the gears.

Actually, there is a predetermined clearance (backlash) between the outer peripheral portions of the cam portions 32 and 35 and the tooth portions (39a and 39b in FIG. 8) on both sides of the toothless portion. Therefore, even if the cam portions 32 and 35 are inserted into the toothless portion 40, they are not completely fixed and have a predetermined degree of rotation. Here, FIG. 12 shows the influence of the backlash in the meshing of the main gear 11, the reversing gear 14, and the screw gear 13. Figure 12
(B) is the center of the toothless portion of the reversing gear 14 and the screw gear 13a.
This is a theoretical position state in which the centers of the toothless portions of are aligned with the center direction of the main gear 11. On the other hand, Fig. 12
(A) and (C) show the state in which the reversing gear 14 and the screw gear 13a freely rotate by the angle 2γ even when the cam is inserted due to the backlash described above.

Of these, FIG. 12 (A) shows the state immediately after the reversing gear 14 is rotationally driven by the main gear 11, and the main gear 11 rotates in this state and the driving of the next screw gear 13a is started. Then, screw gear 13
Since the meshing start tooth 13c of "a" is in the meshing area of the main gear 11, the meshing timing with the main gear 11 is normal. Further, the tooth 13e cannot enter the main gear 11 side from the outer peripheral surface of the cam because the tooth 14c on the reversing gear side and the outer peripheral portion of the cam are in contact with each other, so that the tooth 13e does not serve as the mesh start tooth and is displaced at the mesh timing. Does not occur.

On the other hand, in the state of FIG. 12C, for example, immediately after the reversing gear 14 is rotationally driven, even if the rotation is stopped, the screw 13 is rotated in the direction of the arrow w by the inertial force of the carriage 3 and the teeth 13f are formed. It is in a state of colliding with the outer peripheral portion of the cam of the main gear 11 and stopping. However, in this state, the main gear
When 11 rotates, the teeth 13c that should normally mesh at the start of meshing with the screw gear 13a do not mesh because they are located outside the meshing region of the main gear 11, and mesh with the teeth 13d. Therefore, the meshing timing is deviated, and the meshing timing between the main gear 11 and the reversing gear 14 and the meshing timing between the main gear 11 and the screw gear 13a are deviated. As a result, at the next (after 180 degree rotation) meshing switching, the gears will be locked and each gear tooth may be deformed or damaged.Furthermore, if the motor is continuously energized with the gear locked, circuit burnout due to overcurrent may occur. There is also a nature. The positions of the carriage 3 when the gears are in the states shown in FIGS. 12A to 12C are shown in FIGS.
(C) Position.

That is, in the gear meshing states shown in FIGS. 12 (A) to 12 (C), the meshing timing is deviated between the state of (B) and the state of (C) (hatched portion in FIG. 13). Exists. However, in this embodiment, as shown in FIG. 13, even if the carriage 3 tries to move to the position where the gear meshing timing position is displaced due to the inertial force, the above-mentioned region is caused by the restricting members 1a and 1b provided on the base frame 1. It is regulated not to move to. As a result, the gear engagement timing is prevented from deviating, and gear lock or the like is prevented.

Although the above description has been made with respect to the switching of the gear immediately after the reversing gear 14 is driven, the same applies to the switching of the gear immediately after the screw gear 13a is driven.

(Recording Sheet Conveyance Transmission System) Next, the recording sheet conveyance transmission system will be described. In the recording sheet conveying operation, the tooth portions 36 and 37 integrally formed with the main gear 11 in FIG. 7 intermittently rotate and drive the gear portion 8a of the feed roller 8 as the main gear 11 rotates. Done. The tooth portions 36, 37 are 180 ° out of phase with each other, and are set by the screw 13 so that the carriage 3 is located in the vicinity of both sides and in a region that does not affect the recording operation of the recording head 2. ing.

Next, the recording operation in this embodiment will be described. Incidentally, FIG. 14 is a block diagram showing the configuration of the peripheral portion of the recording apparatus in this embodiment, including a CPU 50 and a keyboard.
It includes a display unit 52, a display unit 52, a power supply unit 53, a motor drive circuit 54, a recording head drive circuit 55, and a recording device 56. There are two types of signals input from the recording device 56 to the CPU 50: an ejection position detection signal output from the ejection signal detector 19 and an ejection start position detection signal output from the recording start signal detector 24. ..

When a voltage is applied to the DC motor 15 to start it, a discharge position detection signal is generated by the encoder slit disk 21a formed integrally with the worm gear 21. This signal is set to be generated in a one-to-one correspondence with each dot row in the dot matrix.

Next, the carriage 3 starts moving in the direction of arrow P from the right end position of FIG. 1, for example, by the mutual operation of the main gear 11, the reversing gear 14, and the screw gear 13a. Next, referring to FIG. 6, as the screw 13 rotates, the screw
The encoder plate 25 fixed to the end of 13 rotates, and the slits 25a and 25b formed on the circumference thereof generate a recording start position signal.

The CPU 50 receives the discharge position start signal,
At the same time, by selectively outputting a recording signal in synchronization with the ejection position detection signal, recording in the direction of arrow P in FIG. 1 is performed. When the recording in the P direction is completed, C
The PU 50 counts the number of pulses of the ejection position detection signal, and turns off the energization of the motor 15 after N pulses. At this time, the recording sheet conveying operation has already been completed as described above, and the carriage 3 stops at the position of the regulating member 1b at the left end portion in FIG.
The above timing chart is shown in FIG.

Next, when the motor 15 is started again, the screw 13 is rotated in the reverse direction by the above-described reversing mechanism of the screw 13, and the carriage 3 starts moving in the direction of arrow Q from the left end of FIG. At this time, as described above, the gear meshing timing does not deviate, and the normal switching operation is reliably performed. A discharge position detection signal is also generated at the same time when the motor 15 is activated. When the encoder plate 25 rotates again, a discharge start position detection signal is generated, and in synchronization with this, the C
Recording is performed in the direction of arrow Q in FIG. 1 by selectively outputting the recording signal from the PU 50.

When the recording in the direction of the arrow Q is completed as described above, the CPU 50 counts the number of pulses of the ejection position detection signal and turns off the energization of the motor 15 after M pulses. At this time, as described above, the recording sheet conveying operation has also been completed,
The carriage 3 stops at the position of the regulating member 1a at the right end in FIG. The above timing chart is shown in FIG.

Recording is performed on the recording sheet by repeating the above-described operation. Further, the CPU 50 needs to determine in advance whether the carriage 3 is located at the left end portion or the right end portion. As a method thereof, for example, when the system is powered on or a specific key (all clear key, etc.) is used. ) Is energized when the motor 15 is pressed. Then, as shown in FIG. 15 or FIG. 16, the shape of the encoder plate 25 is set so that the ejection start position detection signals generate different signals in the arrow P direction and the Q direction. If so, the CPU 50 determines that it is moving in the P direction, and if it is a Y → X type, it is moving in the Q direction.

The difference between the encoder pulses X and Y can be accurately determined by counting the number of pulses of the ejection position detection signal during that time, even if the rotation speed of the motor 15 is different. Further, the number of pulses from the end of recording in the P direction and the Q direction until the driving of the motor 15 is stopped is N and M, respectively, but these pulse numbers are basically set to the same value. However, a slight difference may be made due to a difference in load or the like.

[Other Embodiments] In the above-mentioned embodiments, the reversing gear 14 and the screw gear 13a have shown an example of repeating one rotation operation. It is possible to obtain any rotation angle.

In the above-described embodiment, the regulating member 1 in which the moving area of the carriage 3 is integrally provided on the base frame 1 is also provided.
I adjusted the protrusion of a and 1b to set it,
Of course, the regulation member may be provided on the carriage side.

Further, as shown in FIG. 17, elastic members (for example, compression coil springs) 60a and 60b are arranged at both ends of the moving area of the carriage 3, and the carriage is driven by elastic force against the inertial force of the carriage 3. It is also possible to configure so that 3 does not move to a region where a shift occurs in the gear engagement timing.

Further, although the ink jet recording system is used as the recording means in the above-described embodiment, the electrothermal converter is energized in response to a recording signal, and the film generated in the ink by the thermal energy applied by the electrothermal converter. It is more preferable that the recording is performed by ejecting the ink from the ejection port due to the growth and contraction of bubbles generated in the ink by utilizing boiling.

With regard to its typical structure and principle, it is preferable to use the basic principle disclosed in, for example, US Pat. Nos. 4,723,129 and 4740796. This method can be applied to both the so-called on-demand type and continuous type, but in the case of the on-demand type in particular, it is arranged corresponding to the sheet or liquid path holding the liquid (ink). By applying at least one drive signal to the electrothermal transducer, which corresponds to the recorded information and provides a rapid temperature rise beyond nucleate boiling,
This is effective because heat energy is generated in the electrothermal converter to cause film boiling on the heat acting surface of the recording head, and as a result bubbles in the liquid can be formed in a one-to-one correspondence with this drive signal. Due to the growth and contraction of the bubbles, the liquid is ejected through the ejection opening to form at least one droplet. It is more preferable to make this drive signal into a pulse shape because bubbles can be grown and contracted immediately and appropriately, so that particularly excellent liquid ejection can be achieved.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise of the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications. The present invention also includes configurations using US Pat. Nos. 4,558,333 and 4,459,600, which disclose configurations in which the heat acting portion is arranged in a bending region.

Further, JP-A-59-123670, which discloses a structure in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy are disclosed. Japanese Patent Application Laid-Open No. Sho-A-Ko
The effect of the present invention is effective even with the configuration based on Japanese Patent Publication No. 59-138461. That is, according to the present invention, recording can be reliably and efficiently performed regardless of the form of the recording head.

Also, the serial type described above,
A recording head fixed to the carriage, or a replaceable chip-type recording head that can be electrically connected to the apparatus main body and supply ink from the apparatus main body when mounted on the carriage, or the recording head itself. A cartridge-type recording head provided integrally with an ink tank may be used.

Further, it is preferable to add a recovery means for the recording head, a preliminary auxiliary means, etc., which are provided as a constituent of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. Specific examples thereof include capping means, cleaning means, pressurizing or suctioning means for the recording head, preheating means by electrothermal conversion type or other heating element or a combination thereof, and recording. It is also effective to perform stable recording by performing a preliminary discharge mode in which another discharge is performed.

Regarding the type or number of recording heads mounted on the carriage, for example, only one is provided corresponding to a single color ink, or a plurality of inks having different recording colors and densities are supported. And a plurality of them may be provided. That is, for example, the recording mode of the recording apparatus is not limited to a recording mode of only the mainstream color such as black, but may be a combination of a plurality of recording heads integrally formed, but a mixed color of different colors or a mixed color It is also applicable to a device having at least one of the full colors according to

In addition, although the ink is described as a liquid in the above-mentioned embodiments, it is an ink which solidifies at room temperature or lower and softens or liquefies at room temperature, or in the ink jet recording system. 30 inks
It is common to adjust the temperature within the range of ℃ to 70 ℃ to control the viscosity of the ink so that it is in the stable ejection range. good. In addition, it is possible to prevent the temperature rise due to thermal energy from being positively used as the energy for changing the state of the ink from a solid state to a liquid state, or to use ink that solidifies when left standing for the purpose of preventing ink evaporation. However, in any case, when heat ink is liquefied by application of heat energy according to a recording signal and liquid ink is ejected, or when the ink reaches a recording sheet, it begins to solidify. It is also applicable when using an ink that has the property of being liquefied for the first time by energy.

The ink in such a case is described in JP-A-54-5.
As described in Japanese Patent Publication No. 6847 or Japanese Patent Laid-Open Publication No. Sho 60-71260, a mode in which the porous sheet is opposed to the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole. Also good. The most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

Further, as the form of the above-mentioned ink jet recording apparatus, besides the one used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and further a facsimile apparatus having a transmitting / receiving function. It may be a form or the like.

Although an example using an ink jet recording system as the recording means has been described above, the present invention need not be limited to the ink jet recording system, and other thermal transfer recording systems, thermal recording systems, and Can be applied to an impact recording method such as a wire dot recording method, or any other recording method.

[0053]

As described above, the present invention provides bidirectional rotation of a rotating body which moves the recording means by rotating the drive source in one direction through the first rotating member, the second rotating member and the third rotating member. It is possible to convert, and it is possible to significantly reduce the cost. In addition, the moving area of the carriage
By setting so as not to overlap with the region where the shift occurs at the gear switching timing, it is possible to provide a highly reliable, low cost, highly efficient recording device.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of a recording apparatus according to an embodiment of the present invention.

FIG. 2 is a right side view of the recording device.

FIG. 3 is a left side view of the recording device.

FIG. 4 is a left side view of the recording apparatus with a side plate removed.

FIG. 5 is a front explanatory view of the recording apparatus.

FIG. 6 is an explanatory diagram of a carriage drive system.

FIG. 7 is an explanatory diagram of a main gear.

FIG. 8 is an explanatory diagram of a reversing gear.

FIG. 9 is an explanatory diagram of a screw gear.

FIG. 10 is an explanatory diagram of engagement and disengagement of a main gear and a reversing gear.

FIG. 11 is an explanatory diagram of a relationship between a main gear, a reversing gear, and a screw gear.

FIG. 12 is an explanatory diagram of gear engagement timing.

FIG. 13 is an explanatory diagram of a region in which a shift occurs between a moving position of a carriage and a gear engagement timing.

FIG. 14 is a block diagram around a recording device.

FIG. 15 is a timing chart of recording and sheet conveyance when the carriage is moved in one direction.

FIG. 16 is a timing chart of recording and sheet conveyance when the carriage is moved in the other direction.

FIG. 17 is an explanatory diagram of another embodiment.

[Explanation of symbols]

 2 ... Recording head 3 ... Carriage 8 ... Conveying roller 11 ... Main gear 13 ... Screw 13a ... Screw gear 14 ... Reversing gear 15 ... Motor

Claims (5)

[Claims] 1. A recording unit for recording on a recording material, and a rotating body capable of rotating in the forward and reverse directions for reciprocating the recording unit along a conveyance path of the recording material. A drive source rotatable in a direction, a first rotary member for transmitting a drive force from the drive source, and a state of receiving a drive force from the first rotary member,
A second rotating member that can be in a state in which no driving force is transmitted, a state in which the driving force is transmitted from the first rotating member, and a state in which the driving force is transmitted from the first rotating member. A third rotating member that can be in a non-existing state, a path for transmitting a driving force from the first rotating member to the rotating body as a positive direction rotating force via the third rotating member, and the first rotating member A path for transmitting the driving force from the second rotation member and the third rotation member to the rotating body as a reverse rotation force, and a rotation direction reverse to the forward rotation transmission path along which the recording unit moves. A recording apparatus comprising: a restriction unit for restricting movement of the recording unit to an area where a shift timing occurs when switching the transmission path. 2. The recording means is held by a carriage, and the carriage is provided with a pin that engages with a groove provided in a screw as the rotating body, and according to rotation of the rotating body in forward and reverse directions. The recording apparatus according to claim 1, wherein the recording apparatus reciprocates. 3. The recording apparatus according to claim 1, wherein the recording unit is an ink jet recording system that ejects ink in accordance with a signal to perform recording. 4. The recording apparatus according to claim 3, wherein the recording unit includes an electrothermal converter for generating thermal energy for ejecting ink. 5. The recording means according to claim 4, wherein the recording means discharges the ink from a discharge port by utilizing film boiling generated in the ink by the thermal energy applied by the electrothermal converter. apparatus.