JPH08224932A - Recording apparatus and data processing mechanism - Google Patents

Abstract

PURPOSE: To transmit the rotation from a drive source to a plurality of sections by a simple mechanism. CONSTITUTION: The feed gear 14 driven by a paper feed motor 6 is fixed to a feed roller 5 and, when the slide gear 24 provided to the feed roller 5 in a slidable and rotatable manner is pushed by the projection part 2a of a carriage by the movement of the carriage to slide, the end surface of the slide gear 24 is engaged with the end surface of the feed gear 14 to rotate the slide gear 24 and a pump gear 16 is rotated by the rotation of the slide gear 24 and can be further rotated by the feed gear 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device having a recording means for outputting input information such as characters and images on a recording medium, and a copying machine, a facsimile machine equipped with the recording device as an output means. The present invention relates to an information processing system such as a printer, a word processor and a personal computer.

[0002]

2. Description of the Related Art A recording device drives a recording means provided with a plurality of recording elements for outputting input information such as characters and images on a recording medium (paper, cloth, plastic sheet, etc.) under the control of a control means. Then, the recording operation is performed. The recording device can be classified into an ink jet type, a wire dot type, a heat sensitive type, a thermal transfer type, a laser beam type, etc., depending on the recording system of the recording means used. Among such recording apparatuses, in a serial type recording apparatus that employs a recording method in which main recording is performed in a direction that intersects the recording medium conveyance direction (sub-scanning direction), the recording material is set at a predetermined recording position. After that, an image is recorded (main scanning) by a recording unit (recording head) mounted on a carriage that moves along the recording material, and after one line of recording is completed, a predetermined amount of paper is fed (sub-scanning). ) Is performed, and thereafter, the operation of recording (main scanning) the image of the next row is repeated, whereby image recording of the entire recording material is performed. On the other hand, in a line type recording apparatus that records only by a fortune scan that sends the recording medium in the transport direction, set the recording medium at a predetermined recording position,
After recording one line at a time, a predetermined amount of paper feed (pitch feed) is performed, and then the recording of the next line is performed collectively. Recording is done.

Among them, the ink jet type (ink jet recording apparatus) is a means for recording by ejecting ink from a recording means (recording head) onto a recording medium, and it is easy to make the recording means compact and high definition. Images can be recorded at high speed, plain paper can be recorded without requiring special processing, running costs are low, and the non-impact method reduces noise and uses multicolor inks. Therefore, it is easy to record a color image.

In particular, an ink jet type recording means (recording head) for ejecting ink by utilizing thermal energy is
Through the semiconductor manufacturing process such as etching, vapor deposition, and sputtering, the electrothermal converter, electrode,
By forming the liquid passage wall, the top plate, etc., it is possible to easily manufacture a device having a high-density liquid passage arrangement (ejection port arrangement), and to further reduce the size.

In the above ink jet recording apparatus,
Since a recording head in which fine ejection openings are arranged is generally used, ink is ejected or recorded when air bubbles or dust are mixed into the ejection openings or due to viscosity increase due to evaporation of the ink solvent. Even when the state is not suitable for the above, the ejection recovery processing for removing the ejection failure factor by refreshing the ink is performed.

Generally, in a serial type recording apparatus, a step motor is often used as a carriage driving motor for driving a carriage for main scanning (recording scanning) of a recording head. Further, a step motor is often used as a drive motor for feeding the recording material in the direction perpendicular to the moving direction of the carriage. Furthermore, in order to reduce the number of motors that are drive sources in order to reduce costs, save space, etc., there has been developed a drive source capable of performing a plurality of operations.

FIG. 8 is a perspective view showing the configuration of the main part of a conventional recording apparatus having a drive switching mechanism, taking the case of an inkjet recording apparatus as an example. In FIG. 8, reference numeral 1 is a recording head which is a recording means having a plurality of ejection ports for ejecting ink droplets according to recording information by an internal energy generating means (piezoelectric element, resistance heating element, etc.), and 2 is a recording head A carriage that carries a carriage and reciprocates in the main scanning direction, 3 is a carriage shaft that slidably supports the carriage 2, P is a sheet-shaped recording medium to be recorded, and 5 is the recording medium P depending on the recording situation. It is a feed roller that conveys (paper feed).

Reference numeral 6 is a feed roller 5 and a paper feed motor serving as a drive source for automatic paper feeding, and 7 is a recording head 1.
Is mounted on a cap unit for covering (sealing) the discharge port forming surface of the pump carriage, and is movable in parallel with the carriage shaft 3, 8 is a guide shaft for guiding the parallel movement of the pump carriage 7, and 9 is a pump. A return spring for urging the carriage 7 to the right in FIG. The pump carriage 7 is provided with an arm portion 7a, and a distal end portion thereof is provided with a hole 7b into which the protrusion 2a provided on the right side surface of the carriage 2 can be fitted. When the carriage 2 moves to the left side in FIG. 8, the protrusion 2a is fitted into the hole 7b, so that when the cap 17 is pressed against the ejection port forming surface of the recording head 1, the carriage 2 moves by the carriage shaft 3. Rotation is prevented.

FIG. 9 is a partial perspective view showing a drive source and a transmission switching mechanism of the recording apparatus shown in FIG. 8, and FIG. 10 is a partial perspective view showing a transmission switching gear arrangement in FIG. As shown in FIG. 9, one end of a leaf spring 10 for transmitting a switching force having elasticity in the carriage movement direction is fixed to the rear portion of the pump carriage 7. Further, the other end of the leaf spring 10 is held so as to be sandwiched by a slide gear support 12 that supports a slide gear 24. The slide gear support 12 is mounted so as to be movable in the carriage movement direction along the slide shaft 13. Therefore, the movement (position) of the slide gear 24 can be regulated via the leaf spring 10 according to the movement (position) of the pump carriage 7. That is, when the carriage 2 moves to the left and the protrusion 2 a abuts (engages) with the arm portion 7 a of the pump carriage 7, the slide gear 2 moves by moving them together.
4 moves in that direction in conjunction with the movement of the carriage 2.

The slide gear 24, depending on its position,
As shown in FIG. 10, it is possible to individually mesh with each of a plurality of gears arranged in the carriage movement direction and independently pivotally supported. In FIG. 10, among the plurality of gears, 14 is a feed gear that transmits a driving force to a paper feeding gear fixed to the feed roller 5, and 15 is an automatic sheet feeder (hereinafter referred to as A).
An ASF gear that transmits the driving force to the suction recovery device, and a pump gear 16 that transmits the driving force to the suction recovery device. The pump gear 16 is a combination of two gears 16a and 16b, and a gear 16b on the left side of the drawing is meshed with an idler gear of a suction recovery device. Therefore, depending on the stop position of the carriage 2, the slide gear 24 meshes with any of the plurality of gears 14, 15, 16 via the pump carriage 7 and the leaf spring 10, and the pulse motor 6
Is configured to be selectively transmitted.
That is, the movement of the carriage causes one drive source 6
Is configured to switch the transmission of.

[0011]

However, in the switching mechanism as described above, when the slide gear 24 and the feed gear 14, the ASF gear 15 or the pump gear 16 are engaged with each other, the gear tooth side surface of the slide gear 24 is It is necessary to perform the forward / reverse operation of the pulse motor so that the side surface of the gear tooth of the other gear 14, 15 or 16 can be bitten without colliding. Further, even when the slide gear 24 is disengaged from each gear 14, 15 or 16, it is necessary to perform the forward / reverse operation of the pulse motor 6 in order to cancel the holding state due to the frictional force generated by the meshing of the gear teeth. Therefore, the sequence for switching from each driving state to another driving state may be complicated and may cause a malfunction, resulting in a decrease in reliability of the recording apparatus. Further, since the switching time becomes relatively long, it is not possible to meet the needs for realizing high speed recording operation.

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a recording apparatus having a simple and low-cost drive source transmission switching mechanism, and an information processing system including the apparatus. And it is.

[0013]

Therefore, the recording apparatus according to the present invention is a drive source for driving a plurality of constituent parts such as a carriage for moving the recording means in a predetermined direction, a carriage moving means, and a recording medium moving means. And a transmission switching unit that switches the transmission of the driving force of the drive source by the movement of the carriage, wherein the transmission switching unit includes at least a first axis and a second axis parallel to the first axis. Two shafts, a first gear concentrically fixed to the first shaft and receiving a driving force from a driving source, and a first gear that slides on a sliding surface of the first shaft. A second gear that is rotatable independently of the shaft; and a third gear that is concentrically fixed to the second shaft and has a notch formed in the peripheral edge, and the first gear is the third gear. The first gear and the second gear. The gears are provided with rotation transmitting portions having a substantially triangular shape for transmitting the rotation of the first gear to the second gear when the first gear and the second gear are in contact with each other on the end faces facing each other. The above-mentioned object is to be achieved by the constitution characterized by the above.

Further, the meshing portion of the third gear with the second gear is provided only in a region having the same phase as the cutout portion of the third gear, or the second gear and the second gear. Three
The tooth tip of the meshing portion of the gear has a sharp shape, or the sliding contact operation of the second gear with the first gear by the movement of the carriage is performed twice, and the first time During the sliding contact operation, after rotating the first gear by about a half pitch of the shape of the rotation transmitting portion provided on the end surface of the first gear, the second gear slides on the first gear for the second time. According to a configuration characterized by performing a contact operation, further, the recording means is an inkjet recording means provided with an electrothermal converter that generates thermal energy for ejecting ink, It is an attempt to achieve the purpose.

An information processing system according to the present invention is equipped with the above-mentioned recording device, and heat energy is generated from an electrothermal converter based on recorded information such as characters and images, and ink is ejected from an ejection port by film boiling of the ink. The present invention is intended to achieve the above-mentioned object by a configuration characterized by performing the recording.

[0016]

With the above structure, the first shaft is rotated by rotating the first gear by the drive source, the second gear is slid by the movement of the carriage, and is driven by the rotation transmitting portion of the first gear. The third gear can be driven by the rotation of the second gear and the rotation of the first gear.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic perspective view showing a schematic configuration of an inkjet recording apparatus which is an embodiment of the present invention.

In FIG. 1, a recording head 1 is mounted on a carriage 2. Then, the carriage 2 is slid in a direction orthogonal to the conveyance direction of the recording medium and parallel to the surface of the recording medium P by the carriage shaft 3 and the guide rail 52, both ends of which are fixed to the frame 50 and arranged in parallel with each other. It is movably supported. The carriage 2 has a drive pulley 53 fixed to the output shaft of the carriage motor 18.
And a driven pulley 54 that is rotatably supported, are connected to a part of the belt 19, which is rotated by driving the carriage motor 18.
The carriage 2 is configured to reciprocate in the above direction.

The recording medium before printing is mounted on the pressure plate 55,
The pressure plate 55 is attached to the pickup roller 5 by a release cam (not shown) provided on the shaft on which the pickup roller 56 is mounted.
Away from 6. With the recording medium P set,
When the drive of the feed roller 5 is transmitted to the pickup roller 56 and the release cam by a gear (not shown), the release cam separates from the pressure plate 55 and the pressure plate 55 rises, the pickup roller 56 and the recording medium P come into contact, and the pickup roller 56 moves. The recording medium P is picked up and conveyed as it rotates. The conveyed recording medium P is sent to the roller pair of the feed roller 5 and the pinch roller 57.

The pinch roller 57 is pressed against the feed roller 5 by being urged by a spring (not shown), and produces a conveying force for the recording medium P. A feed gear 14 for transmitting driving force is fixed to one end of the feed roller 5 by press fitting or the like, and the recording medium P is transferred to the base 58 by transmission of the driving force from the feed gear 14 to the feed roller 5.
As the recording head 1 advances along the above, recording can be performed based on predetermined image information.

The rotation of the feed roller 5 is performed by driving a paper feed motor. FIG. 2 is an explanatory view showing the paper feed and recovery drive mechanism when the recording apparatus of FIG. 1 is viewed from above.

The paper feed motor 6 is rotated by the LF motor gear 5
9 and the LF double gear 60 are transmitted to the feed gear 14, and the feed roller 5 rotates. The projection 2a formed on the carriage 2 when the carriage 2 reaches the non-recording area
When the slide gear 24 (which is coaxially slidably and rotatably mounted on the conveying roller) is pushed, the slide gear 24 moves in the direction of the feed gear 14 and moves in the feed gear 14 direction due to the meshing shape described in detail later. Drive is slide gear 2
Transmit to 4. Since the slide gear 24 and the pump gear 16 mesh with each other in this state, the drive is transmitted to the pump gear 16.

Usually, the slide gear 24 is the feed gear 1
4, the feed gear 1 is attached to the pump gear 16.
Since the toothless portion is provided at the position where it meshes with the gear 4, the drive from the feed gear 14 is not transmitted.

At the same time when the feed gear 14 and the pump gear 16 mesh with each other, the carriage 2 is moved to the capping position, and the cap 17 closes the ink ejection port of the recording head 1. The pump gear 16 moves the piston in the cylinder 21 via the cylinder gear 61. Along with this, ink is sucked into the cylinder 21 from the ink ejection port of the recording head 1 through the cap 17, and the ink ejection function of the recording head 1 is restored.

As described above, the transmission of the driving force from the paper feed motor 6 to the pump gear 16 is controlled by the movements of the pump gear 16, the feed gear 14, the slide gear 24 and the carriage 2. The above configuration and operation are shown in FIGS.
This will be described in detail with reference to FIG.

The slide gear 24 shown in FIG. 3 is provided concentrically and slidably on the feed roller 5.
The slide gear 24 and the pump gear 16 are in mesh with each other. In this state, since the slide gear 24 and the feed gear 14 are separated from each other, the drive from the feed gear 14 to the slide gear 24 is not transmitted. Also, the portion of the pump gear 16 that meshes with the feed gear 14 is missing (missing teeth).
Therefore, the driving force of the feed gear 14 is not received.

The carriage 2 is further provided with a feed gear 14
When moved in the direction of, the slide gear 24 further moves to the feed gear 14 side, and the slide gear 24 and the feed gear 14 come into contact with each other. Triangular tooth portions that mesh with each other are provided on the mutual contact surfaces (opposite surfaces of each other). The contact surface between the slide gear 24 and the feed gear 14 is shown in FIG.

The contact tooth shape shown in FIG. 4 is the shape seen from the direction of the arrow in FIG. FIG. 4A shows a contact surface shape 14 a with the slide gear 24 provided on the feed gear 14. As shown in the figure, the contact surface shape 14a is a triangular tooth (hereinafter referred to as a triangular tooth). The pitch is the same as that of the gear 14b, and the troughs of the triangular teeth are set to be in the same direction as the crests of the gear 14b.

FIG. 4B shows a contact surface shape 24 that contacts the feed gear contact surface 14a provided on the slide gear 24.
It shows a. As shown in the figure, contact surface shape 2
4a is a triangular tooth which is the same as the contact surface shape 14a of the feed gear. And its pitch is the same as that of the gear 24b,
The peaks of the triangular teeth are set to be the same as the peaks of the gear 24b.

With the above structure, when the feed gear 14 and the slide gear 24 come into contact with each other, the troughs of the triangular teeth of the contact surface 14a of the feed gear and the peaks of the triangular teeth of the contact surface 24a of the slide gear mesh with each other to form the feed gear. The gears 14b and 24b of the slide gear have the same phase. As a result, the slide gear 24 rotates as the feed gear 14 rotates. Even if the slide gear 24 moves to the feed gear 14, the meshing between the pump gear 16 and the slide gear 24 is not released, so that the rotation of the slide gear 24 causes the pump gear 16 to rotate.

However, in the indirect driving of the pump gear 16 by the feed gear 14 via the slide gear 24, the driving force is limited. Therefore, as shown in FIG. 3, a wide cutout portion 16 is formed on the peripheral portion of the pump gear 16.
a is formed. That is, the pump gear 16 has a portion formed to be thicker than the slide gear 24 and the feed gear 14. Further, the peripheral edge of the pump gear 16 is such that a part of the engraved teeth is from the vicinity of the axial center to the one end direction (in the figure). , Arrow E) has a notch 16a.

FIG. 5 shows a pump gear 16 and a slide gear 24.
4A and 4B are explanatory views seen from the left and right side surfaces of FIG. 3, where FIG. 4A is a right side surface and FIG.

As shown in FIG. 5 (a), the width of the notch (arrow F in the figure) is at least the notch and the feed even if the pump gear 16 and the feed gear 14 are positioned so as to mesh with each other. The width is such that it does not come into contact with the teeth of the gear 14. However, when the slide gear 24 rotates a little, the pump gear 16 rotates and the cutout portion moves so that the pump gear 16 and the feed gear 14 directly mesh with each other, thereby obtaining a large driving force.

In this state, the carriage 2 is replaced with the feed gear 1
4 in a direction away from the pump gear 1 to disengage the mesh between the slide gear 24 and the feed gear 14.
Since 6 and the feed gear 14 are directly meshed with each other, the driving force is transmitted. The slide gear 24 is the pump gear 1
6 and feed gear 14
Since the engagement with is released, there is no problem such as collision of tooth surfaces due to movement of the slide gear.

Further, the pump gear 16 and the slide gear 24
The engagement state of the pump gear 16 and the feed gear 14 is
Since it is not necessary when the gear is in the meshed state, the meshing region of the pump gear 16 with the slide gear 24 is at least the meshing part (hatched part, arrow in the figure) of the cutout region or more as shown in FIG. 5B. It is only necessary to provide G). With this configuration, the tooth width can be reduced except for the meshing portion of the pump gear 16 with the slide gear 24.
Other mechanical parts or the like can be arranged in the area.

Next, the pump gear 16 and the feed gear 14
Slide gear 24 and feed gear 1 after meshing
The mechanism for releasing the engagement with No. 4 will be described.

As described above, when the slide gear 24 and the feed gear 14 are in mesh with each other, the triangular teeth formed on the contact surfaces of both gears are in mesh with each other. Even if the carriage 2 is separated from the slide gear 24 from this state and the feed gear 14 is further rotated, the driving force is not transmitted to the slide gear 24 because the driving force is directly transmitted between the pump gear 16 and the feed gear 14. Gear 24
Remains in mesh with the feed gear 14. From this state, in order to release the drive transmission from the feed gear 14 to the pump gear 16, the rotation of the feed gear 14 is reversely rotated. Then, the toothless portion 16a of the pump gear appears again. At the same time, pump gear 1
6 meshes with the slide gear 24 (see FIG. 5).
(B), G portion) and the slide gear 24 are again in mesh with each other.

When the feed gear 14 is further rotated, direct drive transmission between the pump gear 16 and the feed gear 14 is stopped and the rotation of the pump gear is stopped. However, since the slide gear 24 meshes with the feed gear 14 and rotates further, the drive transmission to the pump gear 16 is transmitted through the slide gear 24. At this time, in the pump gear 16, the arm portion 21a of the cylinder 21 is in the pump gear 1 state as shown in FIG.
It does not rotate because it collides with the wall surface 16c of the concave portion 6 and prevents rotation. Therefore, a force in the thrust direction acts on the slide gear 24 along the tooth surface of the gear of the pump gear 16, and the slide gear 24 is separated from the feed gear 14.

As described above, after the driving force of the feed gear 14 is directly transmitted to the pump gear 16, the slide gear 24 is not in mesh with the pump gear 16. Further, the engagement of the feed gear 14 is also such that the bias of the carriage 2 is released, so that there is no guarantee that the slide gear 24 is always engaged with the feed gear 14. For this reason,
When the pump gear 16 and the slide gear 24 mesh with each other, the phases may not match and tooth crests may hit each other.
In that case, since the conventional tooth profile has a flat tooth tip, the other tooth tip may ride on the tooth tip flat surface as shown in FIG. 6A, and the gears may be locked. . In view of this, in the present embodiment, as shown in FIG. 6 (b), all the tooth tips where the pump gear 16 and the slide gear 24 mesh with each other have a sharp shape, for example, a high tooth gear, so that the tooth tip is locked. Can be prevented.

Next, the slide gear 24 and the feed gear 14
The slide gear 24 and the feed gear 14 are engaged with each other by pushing the slide gear 24 with the carriage 2 and engaging the feed gear 1 with each other.
4 and the pump gear 16 are held in that state until they mesh with each other.

However, in this configuration, the slide gear 24
The feed gear 14 and the feed gear 14 are meshed with each other by meshing the triangular teeth provided on the side surfaces of both gears. When the slide gear 24 is pushed in by the carriage 2, the triangular gear crests of the slide gear 24 and the feed gear 14 (see FIG. 4 (a) and 4 (b) may collide with each other. At this time, even if the feed gear 14 is rotated, the driving force is not transmitted to the pump gear 16 because the slide gear 24 is not in mesh with the feed gear 14.

Further, since the feed gear 14 and the slide gear 24 come into contact with each other earlier than the original meshing portion, the pushing amount of the carriage 2 increases and the carriage motor 1
When a load exceeding the allowable load torque of 8 is applied, the slide gear 24 and the feed gear 14 are detuned due to the step-out of the carriage.
The push of may be released.

Therefore, in this configuration, the slide gear 24 is pushed in by the carriage 2 twice. That is, when the carriage 2 is pushed in for the first time, the feed gear 14 is rotated by ½ phase of the gear. As a result, the triangular teeth provided on the feed gear are set in the same phase as the gear, so if the triangular gear crests of the feed gear 14 and the slide gear 24 are in contact with each other, By shifting two phases, the peaks and troughs of the triangular teeth mesh with each other. If the original crests and troughs of the triangular teeth are in mesh with each other, there is no problem because the slide gear 24 and the feed gear 14 rotate as they mesh with each other.

Next, when the carriage is once retracted from this state and the carriage 2 is moved again to push the slide gear 24 toward the feed gear 14 side, the ridges and valleys of the triangular teeth of the slide gear 24 and the feed gear 14 mesh with each other. , The original meshing state is obtained. The above series of operations is shown in the flowchart of FIG.

[0045]

As described above, according to the present invention, the first shaft is rotated by the rotation of the first gear by the drive source, and the second gear is slid by the movement of the carriage.
The third gear can be driven by the rotation transmission portion of the gear, and the third gear can be driven by the rotation of the second gear and the rotation of the first gear.

Then, the spring member for slidingly contacting the second gear with the first gear by two operations of the carriage to surely transmit the drive to the third gear and separating the second gear from the first gear. Since the second gear is reliably separated from the first gear without the provision of a drive, it is possible to perform the drive switching operation while keeping the width of the main body of the device small while being simple and inexpensive. It is possible to provide a high-performance and compact recording device and an information processing system.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an inkjet recording apparatus that is an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a piston drive transmission path of a recovery system from the paper feed motor of the embodiment.

FIG. 3 is an enlarged view around a switching mechanism unit in FIG.

FIG. 4 is a cross-sectional view showing a meshing shape of a feed gear and a slide gear according to an embodiment.

FIG. 5 is an explanatory diagram showing a configuration arrangement of a slide gear and a pump gear of the embodiment.

FIG. 6 is an explanatory diagram showing tooth tip shapes of a meshing gear of a slide gear and a pump gear according to an embodiment.

FIG. 7 is a flow chart for performing switching drive by two meshing operations of the carriage of the embodiment.

FIG. 8 is a schematic perspective view of a recording apparatus having a conventional switching mechanism.

9 is a partial perspective view showing a drive source and a transmission switching mechanism of the recording apparatus of FIG.

FIG. 10 is a partial perspective view showing a gear arrangement for transmission switching in FIG.

[Explanation of symbols]

 1 Recording Head 2 Carriage 3 Carriage Axis 5 Feed Roller 6 Paper Feed Motor 7 Pump Carriage 8 Guide Axis 9 Return Spring 10 Leaf Spring 12 Slide Gear Support 13 Slide Axis 14 Feed Gear 15 ASF Gear 16 Pump Gear 17 Cap 18 Carriage Motor 19 Belt 21 Cylinder 24 Slide Gear 50 Frame 52 Guide Rail 53 Drive Pulley 54 Driven Pulley 55 Pressure Plate 56 Pickup Roller 57 Pinch Roller 58 Base 61 Cylinder Gear P Recording Medium

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideki Yamaguchi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hideaki Kawakami 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Takeshi Iwasaki 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Hiroyuki Inoue 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. ( 72) Inventor Hitoshi Nakamura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (6)

[Claims] 1. A carriage for moving a recording means in a predetermined direction, a carriage moving means, a drive source for driving a plurality of constituent parts such as a recording medium moving means, and a driving force transmission of the drive source by movement of the carriage. A recording apparatus having transmission switching means for switching, wherein the transmission switching means includes at least a first shaft and the first shaft.
And a second shaft parallel to the first shaft, a first gear concentrically fixed to the first shaft and receiving a driving force from a driving source, and a sliding surface of the first shaft. A second gear that slides on the first shaft and is rotatable independently of the first shaft; and a third gear that is concentrically fixed to the second shaft and that has a notch formed in the peripheral edge, The first gear has a peripheral edge portion that faces the cutout portion position of the third gear, and the first gear and the second gear are in contact with the first gear and the second gear at their respective end surfaces facing each other. The recording apparatus is provided with a rotation transmitting portion having a substantially triangular shape for transmitting the rotation of the first gear to the second gear at the time of performing. 2. The recording apparatus according to claim 1, wherein the meshing portion of the third gear with the second gear is provided only in a region having the same phase as the cutout portion of the third gear. 3. The recording apparatus according to claim 2, wherein a tooth tip of a meshing portion of the second gear and the third gear has a sharp shape. 4. The sliding contact operation of the second gear to the first gear by the movement of the carriage is performed twice, and the rotation transmission provided on the end surface of the first gear at the first sliding contact operation. 4. The second sliding contact operation of the second gear to the first gear is performed after rotating the first gear by about a half pitch of the shape of the portion, according to claim 1. The recording device described. 5. The recording apparatus according to claim 1, wherein the recording unit is an inkjet recording unit including an electrothermal converter that generates thermal energy for ejecting ink. . 6. The recording device according to claim 5, comprising:
An information processing system, characterized in that thermal energy is generated from the electrothermal converter based on recording information such as an image, and ink is ejected from an ejection port by film boiling of the ink to perform recording.