JPH0776100A - Liquid jet printing device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a small-sized printing device that can prevent displacement of the print head due to the pressing force of the ink tank when exchanging ink and that is low in running cost. [Structure] The ink cartridge 6 on the bottom portion 2a of the carriage 2 is pressed against the print head 5 to
The ink absorber 6a therein is pressed by the ink supply port 5b of the head 5. The tank lever 4 is rotated in the direction of arrow G, and the engaging claw 4d of the tank lever 4 is engaged with the engaged hole 3 of the head lever 3.
engage d. At this time, the inner protrusion 4 of the tank lever 4
c presses one side wall of the cartridge 6 toward the head 5 along the arrow F direction. This pressing direction is the same as the arrow D direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid jet printing apparatus having an improved structural relationship between a print head and an ink cartridge which can be attached to and detached from the print head.

Here, as the print, cloth, thread, paper,
The present invention can be applied to all kinds of information processing devices or a printer as an output device thereof, including the application of ink to all ink supports that receive various types of ink application such as sheet materials. It is something.

[0003]

2. Description of the Related Art Recent inkjet recording devices (hereinafter,
2. Description of the Related Art Manufacturing of a print head (referred to as a printing apparatus), in particular, a print head has been performed by a semiconductor film forming process, a micro processing technique, or the like, and a smaller and less expensive print head is being provided.

In such a printing apparatus, a so-called disposable type in which a print head element for ejecting ink as a printing liquid and an ink tank for supplying ink to this element are integrated with each other A print head having a print head (hereinafter referred to as an integrated print head) is known.

In such a liquid jet printing apparatus, when the ink tank integrated type head is mounted on the carriage of the main body apparatus side, (1) ink is printed on a recording medium such as paper (hereinafter referred to as a printing medium). The ink tank-integrated head is mounted on the carriage because the ink is accurately attached to an appropriate position on the carriage for printing, and (2) the connection terminals for transmitting a print signal must be properly connected. It had to be fixed and mounted in the appropriate position above.

Here, as a method of mounting the ink tank integrated type head, a method of mounting the head in parallel or by rotating it from above or behind the carriage, or temporarily mounting the head in a predetermined direction on the carriage and then fixing the head is fixed. A method of operating the lever or the like to press it into an appropriate fixing position to fix it can be mentioned.

By using such an ink tank integrated head, an inexpensive printing apparatus can be obtained and ink can be easily replaced without soiling the hands.

However, the disposable type ink tank integrated head described above is normally in a recordable state even after the ink in the tank is used up, and therefore it is possible to reduce the running cost. Although it suffices to increase the tank capacity as much as possible, in this case, there is a disadvantage that the entire printing apparatus becomes large.

Therefore, the dimensions of the printing apparatus can be maintained as they are by maintaining the outer dimensions of the ink tank as they are.
On the other hand, a method of achieving a reduction in running cost, stopping the disposable use of the print head, and further supplying only ink has been studied from the viewpoint of ecology. As a result, a method has been proposed in which the print head and the ink tank are separately provided, mounted on a carriage, and only the ink tank is replaced a plurality of times. However, in a printhead having such an ink tank as a separate body, when a new ink tank is pushed into the printhead element, a pressing force is applied to the printhead element rather than the ink tank at the connecting portion between the two, and the printhead Shifts from the predetermined position on the carriage. In this case, the print head is misaligned with respect to the print medium, resulting in a problem that high quality print cannot be obtained.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a printing apparatus which is capable of preventing the print head from being displaced due to the pressing force of the ink tank when exchanging ink, and is small in size and low in running cost. .

[0011]

In order to achieve the above object, the present invention according to claim 1 is a print head for ejecting a printing liquid to print on a print medium, and a print head mounted with the print head. A liquid ejecting printing apparatus including a carriage that reciprocates in the width direction of a print medium, and an ink cartridge that is mounted on the carriage separately from the print head and that stores the printing liquid supplied to the print head. In the case of connecting the ink cartridge to the print head, the direction of the pressing force applied to the print head of the ink cartridge is the direction of the print head when the print head is mounted on the carriage. It is characterized in that it matches the direction of the pressing force applied to the carriage. .

According to a second aspect of the present invention, a print head that jets a printing liquid to print on a print medium, and a carriage that mounts the print head and reciprocates in the width direction of the print medium. A liquid ejecting printing apparatus including an ink cartridge that is mounted on the carriage separately from the print head and that contains the printing liquid supplied to the print head, the ink cartridge being coupled to the print head At this time, the component of the pressing force applied to the print head of the ink cartridge is greater than the pressing force applied to the carriage of the print head when the print head is mounted on the carriage. It is characterized by being set to be weak.

In the liquid jet printing apparatus according to the present invention, the print head may be detachable from the carriage, and at least one ink cartridge may be mounted on the carriage. Further, in the liquid jet printing apparatus according to any one of claims 1 to 4, the print head is a film boiling on the printing liquid as an element that generates energy used for ejecting the printing liquid. It may have an electrothermal converter that generates heat energy that causes

[0014]

According to the present invention, when the ink cartridge is connected to the print head, the direction of the pressing force applied to the print head of the ink cartridge is set in the direction of mounting the print head on the carriage. Is applied to the print head of the ink cartridge by matching the direction of the pressing force applied to the carriage of the print head, or when the ink cartridge is coupled to the print head. The component of the pressing force is set to be weaker than the pressing force applied to the carriage of the print head when the print head is mounted on the carriage. The positional deviation with respect to is reliably prevented.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 3 are views showing a main part of an embodiment of a printing apparatus of the present invention. FIG. 1 shows a state in which a print head and an ink cartridge are mounted on a carriage. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is a schematic perspective view schematically showing a state when the ink cartridge shown in FIGS. 1 and 2 is mounted. It is a figure.

First, in FIGS. 1 and 2, reference numeral 1 denotes a guide shaft which is arranged in a direction orthogonal to a transport direction A of a recording paper (not shown) as a print medium. A carriage 2 is reciprocally arranged on the guide shaft 1 along its longitudinal direction. The carriage 2 is a substantially box-like body, and is roughly configured by one bottom portion 2a and three wall portions 2b, 2c and 2d by cutting out a portion corresponding to the upper top plate and one wall portion separated from the guide shaft 1. . The first wall portion 2b near the guide shaft 1 has a bearing portion 2e for slidably engaging the guide shaft 1 at a lower portion thereof. The bottom portion 2 is sandwiched by the first wall portion 2b.
a pair of second members that stand upright from the edge of a and face each other
The wall portion 2c and the third wall portion 2d have cutouts 2 in the upper portion.
f and 2g are formed. In addition, on both wall portions 2c and 2d, an upper portion close to the first wall portion 2b side,
Bearing portions 2h and 2i for pivotally supporting a head lever described later are formed. Also, the bottom 2a
Has an opening 2 at a position near the guide shaft 1 for receiving a portion on a discharge port side of a print head described later.
j is formed, and a step 2k is formed on the side away from the guide shaft 1 and is lowered by one step. The bottom 2
A stopper 2l for stopping the movement of an ink cartridge, which will be described later, is formed at the boundary between a and the opening 2j. A bearing 2m for pivotally supporting a tank lever, which will be described later, is provided in the central portion of the step 2k of the bottom portion 2a.

The head lever 3 and the tank lever 4 described above are rotatably attached to the carriage 2 having a substantially box-like structure. That is, the head lever 3
Is rotatably supported by bearings 2h and 2i of the carriage 2, and when the rotation is at the lowest end, the print head 5 having the ejection opening portion engaged with the opening 2j of the carriage 2 is Fixed. The fixing mechanism will be described below. Protrusions 5a (only one of which is shown in FIG. 2) having slopes s are provided on both sides of the print head 5, and when the print head 5 is housed in the carriage 2, the carriage 2 is cut off. It is configured to be exposed to the outside from the notches 2f and 2g. On the other hand, both wing portions 3a and 3b of the head lever 3 are attached to the carriage 2
It has a shape substantially corresponding to the shape of the cutouts 2f and 2g. Therefore, when the print head 5 is accommodated in the carriage 2 and the head lever 3 is covered, both the wing portions 3a and 3b of the head lever 3 are moved to the print head 5.
By pressing the slope s of the protrusion 5a, the print head 5 can be fixed at a predetermined position of the carriage 2.

Such a back plate portion 3c of the head lever 3
An engaged hole 3d for engaging with a tank lever described later is formed in the center of the.

The tank lever 4 is a substantially L-shaped movable member which is roughly composed of a lower arm portion 4a and an upper arm portion 4b, and the carriage 2 is provided at the lower end portion of the lower arm portion 4a.
Is rotatably supported by a bearing 2m on the step 2k. An inner surface protrusion 4c is formed on the inner surface of the lower arm portion 4a for pressing one side surface of the ink cartridge 6 to ensure the coupling of the ink cartridge 6 to the print head 5, and an inner surface of the upper arm portion 4b is provided on the inner side of the tip thereof. An engaging claw 4d for engaging with the engaged hole 3d of the head lever 3 is formed.

Next, a method of mounting the print head 5 on the carriage 2 and a method of mounting the ink cartridge 6 on the print head 5 and the carriage 2 will be described.

First, the head lever 3 pivotally supported by the bearings 2h and 2i of the carriage 2 is rotated and raised to open the upper portion of the carriage 2 so that the opening 2j of the carriage 2 is engaged with the ejection port portion. The print head 5 is housed in the carriage 2. Next, the head lever 3 is rotated around the bearing portions 2h and 2i in the direction of the arrow B to cover it. At this time, both wing portions 3a and 3 of the head lever 3 are
Since b presses the slope s of the protrusion 5a of the carriage 2 in the arrow C direction, component forces in the arrow D direction and the arrow E direction are generated as shown in FIG. The component force D acts to press the print head 5 toward the inner surface of the first wall portion 2b of the carriage 2. Also, the component force E is the carriage 2
To press the ejection opening portion of the print head 5 toward the opening 2j. The direction in which this component E acts is
It is the same as the ink ejection direction by the print head 5.
Although depending on the inclination angle of the slope s formed on the protrusion 5a of the print head 5, the main component of the component force of the pressing force applied in the C direction is the component force D, and the print head 5 and the carriage 2 have a wider surface. By contacting with, more stable mounting becomes possible. Due to such component forces D and E, the print head 5 is securely and firmly fixed to the inner surface of the first wall portion 2b of the carriage 2, and is engaged with the opening 2j of the carriage 2 and fixed at a predetermined position. .

Next, as shown in FIG. 3, the ink cartridge 6 is slid on the bottom portion 2a of the carriage 2 in the direction of arrow F, and the ink cartridge 6 is pressed against the print head 5 so that the ink absorber 6a in the ink cartridge 6 is pushed. Is pressed by the ink supply port 5b of the print head 5. The above-mentioned tank lever 4 is used for this pressing operation. That is,
The bearing portion 2 of the carriage 2 holds the upper portion of the ink cartridge 6 arranged on the bottom portion 2 of the carriage 2.
The tank lever 4 pivotally supported by m is rotated around its bearing (in the direction of arrow G), and the engaging claw 4d at the tip of the upper arm 4b of the tank lever 4 is engaged with the engaged hole 3d of the head lever 3. To do. At this time, the inner surface protrusion 4c of the lower arm portion 4a of the tank lever 4 presses one side wall of the ink cartridge 6 toward the print head 5 along the arrow F direction. In this way, the ink lever 6 is pressed toward the print head 5 by the tank lever 4, but in this pressing direction (F direction).
Is the same as the previous arrow D direction. In this embodiment,
This point is very important. That is, when the ink cartridge 6 is mounted, the print head 5 is pressed mainly in the arrow D direction and is already positioned at the predetermined position of the carriage 2, so that the pressing direction (D direction) as the positioning direction. If the ink cartridge 6 is pressed and mounted in a different direction, the print head 5 may be misaligned, which causes a problem that high-quality printing cannot be realized. Therefore, the mounting of the ink cartridge 6 on the print head 5 must be performed in the positioning direction of the print head 5. However, as mentioned above,
It does not mean that the component force is not recognized, but if the component force is in a direction that does not impair the positioning of the print head 5, for example, in the direction of the arrow E, there is no risk of displacement of the print head 5 and it can be used. However, the magnitude of the component force E must be much smaller than that of the component force D. This is because when the component force E is larger than the component force D, the print head 5 is not reliably attached to the carriage 2 and the print head 5 is displaced. Further, the movement of the pressed ink cartridge 6 in the arrow F direction is blocked by the stopper 2l on the bottom 2a of the carriage 2.

As described above, in this embodiment, the ink cartridge 6 can be easily mounted on the print head 5 without damaging the mounting position of the print head 5. On the contrary, since the ink cartridge 6 can be easily removed from the print head 5, when the print head 5 is further usable, when the ink remaining amount in the ink cartridge 6 becomes zero,
Only the ink cartridge 6 can be easily removed from the print head 5 and replaced with a new one. Also,
In this embodiment, only the ink cartridge is replaced, so that the running cost can be suppressed lower than that of the disposable type in which the print head and the ink cartridge are integrated. Furthermore, the ink cartridge can be easily replaced, and the displacement of the print head does not occur during the replacement, so that highly accurate printing can be maintained.

(Embodiment 2) FIG. 4 is a schematic perspective view showing the main part of another embodiment of the printing apparatus of the present invention.
The present embodiment is characterized in that the first embodiment is of a type in which one ink cartridge is attached to one print head, whereas a plurality of (four) ink cartridges are provided to one print head. The point is that it is a multi-color print type. That is, the print head 5 mounted on the carriage 2 has four ink supply ports 5c to 5f arranged at equal intervals along the longitudinal direction of the guide shaft 1. Although not shown in FIG. 4, the print head 5 is substantially the same as the head lever 3 shown in FIGS. 1 and 2, and the head 5 is positioned at a predetermined position of the carriage 2 and then fixed. Ink cartridges 6b to 6e can be attached to the ink supply ports 5c to 5f of the print head 5, respectively. Here, these ink cartridges 6b to 6
The tank lever for fixing e may be a collective type that fixes the whole body at once, or may be a dedicated type that individually fixes the ink cartridges 6b to 6e. The former batch type is advantageous in that it is possible to fix a plurality of ink cartridges at once at the start of use. In addition, the latter dedicated type has an advantage that individual replacement can be performed without temporarily releasing or relaxing the fixing of the ink cartridge that does not require replacement.

Generally, in the case of a multi-color printing type printing apparatus, the positional deviation of the head has a greater effect on the image quality than in monochrome or mono-color printing, but the positional deviation of the head is surely prevented as in this embodiment. By doing so, high-quality printing can be easily performed.

(Embodiment 3) FIG. 5 is a cross-sectional view showing the main part of still another embodiment of the printing apparatus of the present invention. The feature of this embodiment is that the tip cut end of the ink supply port of the print head is different from the other embodiments. That is, the cut end of the ink supply port 5g of the print head 5 is formed obliquely. In this case, the ink supply port 5g receives a pressing force from the ink absorber 6a.
As shown in FIG. 5, the force is divided into a component force in the arrow H direction that coincides with the above-mentioned arrow F direction and a component force in the arrow I direction opposite to the ink ejection direction E of the head 5. Here, the relationship between the component force I and the pressure component force E becomes a problem. Ink supply port 5g
Ink supply port 5g
Becomes an acute angle, the component force I becomes large, and the pressing component force E becomes small, so that the print head 5 may not be sufficiently pressed by the carriage 2 and may be displaced. On the contrary, when the inclination angle of the cut end of the ink supply port 5g increases,
The ink supply port 5g becomes an obtuse angle, the component force I becomes smaller,
The pressing force E is increased and the print head 5 is sufficiently pressed by the carriage 2. Therefore, the inclination angle of the cut end of the ink supply port 5g is determined by appropriately considering the relative magnitude of each component force, the material of the ink absorber 6a, the ink remaining amount, and the relationship between the pressing force. By setting the angle to an ideal value, it is possible to stabilize the ink supply from the ink absorber 6a of the ink cartridge 6.

FIG. 6 is a schematic perspective view showing an example of a liquid jet printing apparatus to which the print head according to each of the above embodiments can be mounted and applied. In FIG. 6, 601
Is the print head according to the above embodiment. The head 601 is mounted on a carriage 607 that engages with a spiral groove 606 of a lead screw 605 that rotates via driving force transmission gears 603 and 604 in association with forward and reverse rotations of a drive motor 602. By the power of the drive motor 602, the carriage 607 is reciprocally moved along the guide 608 in the directions a and b. The paper pressing plate 610 of the print paper P conveyed on the platen 609 by a recording medium supply device (not shown) presses the print paper P against the platen 609 in the carriage movement direction.

Photocouplers 611 and 612 are arranged near one end of the lead screw 605. These are home position detecting means for confirming the presence of the lever 607a of the carriage 607 in this area and switching the rotation direction of the drive motor 602 and the like. In the figure, reference numeral 613 is a support member that supports a cap member 614 that covers the front surface of the print head 601 on which the ejection ports 504 are provided. Further, reference numeral 615 is an ink suction means for sucking ink that has accumulated in the cap member 614 due to idle ejection from the head 601. The suction means 615 carries out suction recovery of the head 601 through the opening 616 in the cap. 617 is a cleaning blade, and 618 is a moving member that allows the blade 617 to move in the front-back direction (direction orthogonal to the moving direction of the carriage 607). The blade 617 and the moving member 618
Are supported by the main body support plate 619. Blade 6
17 is not limited to this form, and may be another known cleaning blade. Reference numeral 620 is a lever for starting suction in the suction recovery operation.
The cam 621, which is engaged with 07, moves along with the movement of the cam 621, and the movement of the driving force from the driving motor 602 is controlled by a known transmission means such as clutch switching. The print control unit that gives a signal to the heating element 302 provided in the head 601 and controls the drive of each mechanism described above is provided on the apparatus main body side, and is not shown here. In the printing apparatus 600 having the above-described configuration, the head 601 reciprocates over the entire width of the paper P on the print paper P conveyed on the platen 609 by a print medium feeding device (not shown), and performs recording. Head 601
As described above, since high-density printing is possible, high-precision and high-speed printing is possible.

In the above description, the liquid jet printing type head is used as the substrate, but a thermal head type head may be used, for example.

The present invention brings excellent effects especially in a print head and a printing apparatus of the type which ejects ink by utilizing thermal energy, which is proposed by Canon Inc. among liquid jet printing types.

(Others) The present invention is provided with a means (for example, an electrothermal converter or a laser beam) for generating thermal energy as energy used for ejecting ink, particularly in the ink jet recording system. The present invention brings about excellent effects in a recording head and a recording apparatus of the type in which the state of ink is changed by the heat energy. This is because such a system can achieve high density recording and high definition recording.

Regarding the typical structure and principle thereof, see, for example, US Pat. No. 4,723,129 and US Pat. No. 4,740.
What is done using the basic principles disclosed in 796 is preferred. This method is a so-called on-demand type,
It can be applied to any of the continuous type, but especially in the case of the on-demand type, it can be applied to the sheet holding the liquid (ink) or the electrothermal converter arranged corresponding to the liquid path. By applying at least one drive signal corresponding to the recording information and giving a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal converter, and film boiling is caused on the heat acting surface of the recording head. Liquid (ink) corresponding to this drive signal in a one-to-one correspondence
It is effective because bubbles can be formed inside. Due to the growth and contraction of the bubbles, the liquid (ink) 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 the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness 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 on 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 straight liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications. US Pat. No. 4,558,333, US Pat. No. 4,558,333, which discloses a configuration in which a heat acting portion is arranged in a bending region.
The structure using the specification of No. 59600 is also included in the present invention. In addition, Japanese Unexamined Patent Publication No. 59-123670 discloses a configuration 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 is provided. The effect of the present invention is effective even if the configuration corresponding to the ejection portion is disclosed in JP-A-59-138461. That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

Further, the present invention can be effectively applied to a full line type recording head having a length corresponding to the maximum width of a recording medium which can be recorded by the recording apparatus. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads or a configuration as one recording head integrally formed.

In addition, even in the case of the serial type as in the above example, the recording head fixed to the main body of the apparatus or the electrical connection to the main body of the apparatus or the ink from the main body of the apparatus by being mounted on the main body of the apparatus The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is integrally provided in the recording head itself is used.

Further, as the constitution of the recording apparatus of the present invention, it is preferable to add an ejection recovery means of the recording head, a preliminary auxiliary means and the like because the effects of the present invention can be further stabilized. Specifically, heating is performed by using a capping unit, a cleaning unit, a pressure or suction unit for the recording head, an electrothermal converter or a heating element other than this, or a combination thereof. Examples thereof include a preliminary heating unit for performing the discharge and a preliminary discharge unit for performing discharge different from the recording.

Regarding the type and number of recording heads to be mounted, 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. A plurality of pieces may be provided. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but it may be either the recording head is integrally formed or a plurality of combinations may be used. The present invention is also extremely effective for an apparatus provided with at least one of full-color recording modes by color mixing.

In addition, in the embodiments of the present invention described above, the ink is described as a liquid, but an ink that solidifies at room temperature or lower and that softens or liquefies at room temperature may be used. Or, in the inkjet system, it is common to control the temperature of the ink itself within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature so that the viscosity of the ink is within the stable ejection range. Sometimes, a liquid ink may be used. In addition, the temperature rise due to thermal energy is positively prevented by using it as the energy of the state change of the ink from the solid state to the liquid state, or in order to prevent the evaporation of the ink, it is solidified and heated in the standing state. You may use the ink liquefied by. In any case, by applying thermal energy such as ink that is liquefied by applying thermal energy according to the recording signal and liquid ink is ejected, or that begins to solidify when it reaches the recording medium. The present invention can be applied to the case where an ink having a property of being liquefied for the first time is used. In this case, the ink is
JP-A-54-56847 or JP-A-60-7
As described in Japanese Patent No. 1260, it may be configured to face the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as the form of the ink jet recording apparatus of the present invention, other than the one used as an image output terminal of information processing equipment such as a computer, a copying apparatus combined with a reader or the like, and a facsimile apparatus having a transmission / reception function can be used. It may be a form or the like.

[0041]

As described above, according to the present invention,
Since the positional deviation of the print head with respect to the carriage can be reliably prevented, highly accurate printing can be performed. Also, since the print head and ink cartridge are separate and can be separated, the print head and ink cartridge can be integrated by replacing the ink cartridge with a new one, leaving the print head still usable. Running costs can be kept low compared to other products.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of an embodiment of a printing apparatus of the present invention, and is a schematic perspective view showing a state in which a print head and an ink cartridge are mounted on a carriage.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a schematic perspective view schematically showing a state when the ink cartridge shown in FIGS. 1 and 2 is mounted.

FIG. 4 is a schematic perspective view showing a main part of another embodiment of the printing apparatus of the present invention.

FIG. 5 is a schematic cross-sectional view showing the main parts of yet another embodiment of the printing apparatus of the present invention.

FIG. 6 is a schematic perspective view showing a configuration of a printing apparatus as an example in which the print head shown in FIG. 1 and the like can be mounted, with an upper lid removed.

[Explanation of symbols]

 1 guide shaft 2 carriage 2a bottom 2b first wall 2c second wall 2d third wall 2e bearing 2f notch 2g notch 2h bearing 2i bearing 2j opening 2k step 2l stopper 2m bearing 3 head lever 3a Wing part 3b Wing part 3c Back plate part 3d Engagement hole 4 Tank lever 4a Lower arm part 4b Upper arm part 4c Inner surface protrusion 4d Engaging claw 5 Print head 5a Projection part s Slope 5b to 5g Ink supply port 6 Ink cartridge 6a Ink Absorber 600 Printing device 601 Print head 602 Driving motor 603 Driving force transmission gear 604 Driving force transmission gear 605 Lead screw 606 Spiral groove 607 Carriage 607a Lever 608 Guide 609 Platen 610 Paper pressing plate 611 Photocoupler 612 Photocap 613 support member 614 cap member 615 ink suction means 616 in the cap opening 617 cleaning blade 618 moves member 619 main body support plate 620 lever 621 cams

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hisashi Morioka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shinya Matsui 3-30-2 Shimomaruko, Ota-ku, Tokyo Non-Incorporated (72) Inventor Makoto Kashimura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Shinji Kanemitsu 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (5)

[Claims] 1. A print head that ejects a printing liquid to print on a print medium, a carriage that mounts the print head and reciprocates in the width direction of the print medium, and the print head on the carriage. A liquid ejecting printing apparatus that includes an ink cartridge that is separately mounted and that contains the printing liquid that is supplied to the print head, wherein when the ink cartridge is coupled to the print head, The direction of the pressing force applied to the print head is the same as the direction of the pressing force applied to the carriage of the print head when the print head is mounted on the carriage. Liquid jet printing device. 2. A print head that jets a printing liquid to print on a print medium, a carriage that mounts the print head and reciprocates in the width direction of the print medium, and the print head on the carriage. A liquid ejecting printing apparatus that includes an ink cartridge that is separately mounted and that contains the printing liquid that is supplied to the print head, wherein when the ink cartridge is coupled to the print head, The component of the pressing force applied to the print head is set to be weaker than the pressing force applied to the carriage of the print head when the print head is mounted on the carriage. A liquid-jet printing apparatus characterized by: 3. The liquid jet printing apparatus according to claim 1, wherein the print head is detachable from the carriage. 4. The liquid jet printing apparatus according to claim 1, wherein at least one ink cartridge is mounted on the carriage. 5. The liquid jet printing apparatus according to claim 1, wherein the print head is
A liquid ejecting apparatus, comprising an electrothermal converter that generates thermal energy that causes film boiling in the printing liquid, as an element that generates energy used to eject the printing liquid. Printing equipment.