Patent Application
20070195141
The present invention relates to a liquid container and a manufacturing method therefor, and more particularly to the liquid container and the manufacturing method for the container, wherein information of a state of the liquid container such as ink remaining amount of the ink container is notified by emitting means such as LED.
The present invention relates to a liquid container, in particular, a liquid container in the form of an ink container removably mountable in an ink jet recording unit or an ink jet recording apparatus, which records on recording medium by ejecting ink.
An ink jet recording apparatus which forms an image on recording medium by depositing ink in the form of liquid with the use of an ink jet recording head is widely used as an outputting means for such an information processing apparatus as a copying machine, a facsimileing machine, an electronic typewriter, a printer as an outputting peripheral device for a wordprocessor, a workstation, a personal or host computer, etc., or a portable printer to be connected to an optical disc apparatus, a video apparatus, a digital camera, etc.
As a system for supplying such an ink jet recording apparatus as those described above with ink, there is a system in which an ink container is inseparably or removably attached to a recording head mounted on a carriage or the like and reciprocally movable (in primary scanning direction), and ink is directly supplied to the recording head from this ink container. Whether an ink jet recording apparatus is structured so that an ink container is inseparably attached to a recording head, or it is structured so that an ink container is removably attached to a recording head, the positioning of an ink container relative to a recording head, or positioning of a recording head unit, that is, the integral combination of a recording head and an ink container, relative to a relevant member (for example, carriage of serial type recording apparatus, reciprocally movable in primary scanning direction) of the main assembly of a recording apparatus, is one of the most important issues related to recording quality. Further, it is very important, in particular, in the field of an ink jet recording apparatus for personal usage, to provide an ink supplying system for an ink jet recording apparatus which is small in size, simple in terms of the operation for mounting or dismounting an ink container or an ink jet recording head unit, and also, simple in terms of mechanism.
Thus, the inventors of the present invention have proposed a combination of an ink container and a structure for removably attaching an ink container, as an answer to the above described concerns. According to this proposal, an ink container is provided with a anchoring claw, which projects from one of the end surfaces, and a springy latching lever with an anchoring claw, which projects from the bottom portion of the opposite surface from the surface with the anchoring claw. Further, the holder to which an ink container is attached is provided with an anchoring hole into which the anchoring claw of an ink container fits, and an anchoring hole into which the anchoring claw of the springy latching lever of an ink container fits. The two anchoring holes of the holder are in the opposing two side walls of the holder, one for one. As for the mounting of the ink container, first, the ink container is to be positioned so that the anchoring claw projecting from one end of the ink container fits into the anchoring hole of the holder, and then, the ink container is to be pushed down into the predetermined position in the holder by the other end to cause the anchoring of the latching lever of the ink container to snap into the anchoring hole of the holder. With the two claws locked in the corresponding anchoring holes, the ink container is prevented from dislodging from the abovementioned predetermined position in the holder.
Such a removably mountable ink container as the one described above has been known to be provided with a storage means capable of electrically storing the information regarding the ink container itself (for example, color of ink therein), in order to make it possible to control the recording process of an ink jet recording apparatus, based on the information stored in the storage means. The information stored in the storage means is read as the ink container is mounted into the ink jet recording apparatus. In the case of an ink jet recording apparatus structured as described above, the ink container must be connected to the recording head so that not only is an ink passage established between the ink container and recording head, but also, an information exchange channel must be established between the two.
As one of the means for accomplishing the above described objects, Japanese Laid open Patent Application 2001 253087 discloses the following structural arrangement: The electrical contacts of an ink container and the electrical contacts of a holder are disposed on the same side so that as the ink container is mounted into the holder, the electrical contacts of both sides come into contact with each other, and also, so that once they are placed in contact with each other, they are kept in contact with each other by the engagements between the anchoring claw, such as the one described above, of the ink container, with the corresponding anchoring hole of the holder, and between the anchoring claw of the latching lever, such as the above described one, of the ink container, and the corresponding anchoring hole of the holder. In the case of this structural arrangement, the electrical contacts of the two sides are automatically connected as the ink container is mounted into the holder, eliminating the need for a mechanism dedicated to the connection, or the need for performing a procedure dedicated for the connection. Therefore, this structural arrangement is advantageous from the standpoint of operational efficiency.
On the other hand, with recent wider use of digital camera, the demand is increasing for printing with the digital camera being directly connected with a printer (recording device), that is, non-PC printing (the printing in which a digital camera is directly connected with a printer, is called “camera direct”). In addition, an information memory medium of a card type which is an information memory medium detachably mountable to a digital camera is directly mounted into a printer, and the data is transferred to the printer to effect print (non-PC print, called “card direct”). This type printing is also increasing. Furthermore, a so-called multi-function printer which has a printer function and a scanner function and which has a copying function without use of a PC (the direct printing function) is increasingly used.
When an ink jet printer is used, it is desirable in some cases that information relating to a state of individual ink container such as mounting state of the ink container, ink remaining amount in the ink container is given to the user. Or, the user desires to be given such information. For example, if the user is aware of the fact the ink remaining amount in the ink container is small, the ink container is replaced with a new one, by which the wasteful printing (only to half way to a recording material, for example) due to the shortage of the ink can be avoided beforehand.
Conventionally, such information is transmitted to the display to which the printer is connected, and the event appears on the display of the PC. In the case of non-PC recording, this is not possible, and therefore, it would be considered to provide the printer (main assembly) with a computer display in which the information can appear. However, the provision of such a display device increases cost of the printer and upsizes the printer, and in addition, design or the like of the printer is influenced, and therefore, the provision of the display device is not always desirable. Even if the display device is provided, it is not always assured that user immediately and clearly recognize the state of the ink container.
In another conventional example, a display element such as LED is used to notify the user of the state of the ink container. For example, Japanese Laid-open Patent Application Hei 4-275156 discloses that ink container which is integral with a recording head is provided with two LED elements, which are switched on depending on the ink remaining amount in two steps. More particularly, an ink cartridge integrally having an ink jet head and an ink container is provided with means for counting a number of electric power supplies to an ink jet head, means for storing the count, a LED for near end display for showing by light emittance thereof the event of approaching of the integrated count to the near end discrimination value, and an ink empty LED which is switched on when the integrated count reaches the ink empty discrimination value.
Similarly, Japanese Laid-open Patent Application 2002-301829 discloses provision, on the ink container or a carriage therefor, of a lamp which is switched on depending on ink remaining amount. The same also discloses that four ink containers used with one recording device are provided with said lamps, respectively.
In addition, in order to meet a demand for high image quality, light magenta ink, light cyan ink and so on become used in addition to the conventional four color (black, yellow, magenta and cyan) inks. Furthermore, use of special color inks such as red ink, green ink or blue ink are proposed. In such a case, seven-eight color ink containers are used individually in an ink jet printer. Then, a mechanism for preventing the ink containers from being mounted at erroneous positions is desired. Japanese Laid-open Patent Application 2001-253087 discloses that configurations of the engaging portion of ink containers engageable with carrying portion of the carriage are made different depending on the colors of the ink containers, so that mounting of ink containers on erroneous position are prevented.
In comparison, the structural arrangement disclosed in Japanese Laid open Patent Application 2001 253087 suffers from the following problems. That is, if the latching lever of the ink container and the electrical contacts of the holder are not equal in resiliency, for example, if the contact pressure of the electrical contacts is greater than the force generated by the resiliency of the latching lever, the latching lever is excessively deformed, failing thereby to keep the ink container in the predetermined position in terms of the direction in which the force generated by the latching lever acts on the ink container. Therefore, it is possible that the ink passage on the ink container side and the ink passage on the recording head side become misaligned at the joint, preventing thereby ink from being properly supplied, and/or allowing ink to leak from the joint. It is also possible that the contact pressure between the electrical contacts on the ink container side and holder side will become unstable, failing thereby to remain properly connected in terms of electrical conduction.
As the solution to the above described problems, it is possible to place the electrical contact portion on the bottom surface of the ink container in the same manner as the one disclosed in Japanese Laid open Patent Application 2 178050. According to Japanese Laid open Patent Application 2 178050, the ink jet recording head is integral with an ink container, and is removably mountable in the carriage of the ink jet recording apparatus. Its electrical contacts through which recording signals are transmitted to the recording head from the main assembly of the recording apparatus are attached to the bottom surface of the recording head, and the corresponding surface of the carriage. Thus, as the recording head is mounted into the carriage, the electrical contacts of the recording head come into contact with the electrical contact of the carriage, and then, keep sliding thereon while the recording head is moved (pivotally) into its final position on the carriage. Therefore, the electrical contacts of the recording head and the electrical contacts of the carriage are better connected in terms of electrical conductivity. Thus, it seems reasonable to the adopt the design of the electrical joint between the recording head and carriage disclosed in Japanese Laid open Patent Application 2 178050 to the design of the electrical joint between an ink container and a recording head, through which the ink container information is electrically transmitted.
However, electrical contacts are electrically conductive members formed of relatively rigid metallic substance, and therefore, applying a large amount of pressure to electrical contacts, and/or causing electrical contacts to slide on each other while applying a large amount of pressure, in order to ensure that the electrical contacts of an ink container and the electrical contacts of the main assembly remain satisfactorily connected in terms of electrical conductivity is unwise from the standpoint of the prevention of the damage to the electrical contacts and the durability of the electrical contacts. In other words, the amount of the pressure to be applied to the electrical contacts to ensure that the electrical contacts of the ink container are kept satisfactorily connected to the electrical contacts of the main assembly must be optimum, that is, the minimum to be effective. Thus, it is unwise to adopt the technologies disclosed in Japanese Laid open Patent Application 2 178050 without any modification. In particular, in the case that an ink container is removably attachable to a recording head, there is the possibility that when an ink container is attached or removed, the tip of the ink outlet of the ink container will come into contact with the electrical contacts of the main assembly, and wets them. Further, should ink leak from the joint between the ink outlet of the ink container and the ink inlet of the main assembly during the mounting of the ink container, it is very likely that the ink having leaked from the joint will reach the electrical contacts, because the electrical contacts are attached to the bottom surface of the ink container.
On the other hand, Japanese Laid-open Patent Application Hei 4-275156 discloses a structure of the ink cartridge wherein a LED for display is mounted on a print circuit board for electrical communication with the main assembly of the printer. However, with such a structure, in order to place the LED at a position allowing easy observation by the user, the PC plate has to be placed at the same to position. However, since the PC plate includes electrical connecting portion for electrical communication with the main assembly of the printer, the latitude of the arrangement is small. It would be considered the use a large area PC plate to cover the preferable position of the electrical connecting portion and the preferable portion of the LED. However, doing so increases the cost. If the structure disclosed in Japanese Laid-open Patent Application Hei 8-58107 is incorporated in a printer which carries a plurality of independent ink containers for the respective colors, the structure for mounting the ink container to the printer is limited, and therefore, the substantive capacity of the ink container has to be reduced, or the printer has to be upsized.
On the other hand, Japanese Laid-open Patent Application 2002-301829 simply discloses that ink warning lamp is provided at such a position that user easily recognizes it. However, it does not disclose a preferable structure for supplying the electric power or the signal to the ink warning lamp. From FIG. 6-FIG. 8, a lead wire connecting the ink jet recording apparatus and the ink warning lamp is suggested, but a number of wiring leads corresponding to the number of ink warning lamps are necessitated with the result of complicated wiring and therefore cost increase, and in addition, the wiring lead and the connecting portion will deteriorate the easy observation. In addition, Japanese Laid-open Patent Application 2002-301829 discloses in its FIG. 6 that ink warning lamp is provided on a fixed lever which is a movable member for fixing the ink container on the carriage for carrying the ink container, and discloses in its FIG. 7 a structure in which the ink warning lamp is provided on the ink container per se. However, there is no disclosure about the electric power supply method to the ink warning lamp.
These problems are more significant recently as a result of the downsizing and the multi-function tendency. Particularly in the case of a multi-function printer in which a scanner is placed at the top of the printer, the position for the display is more limited.
The display is used not only to notify the user of the information but also to permit proper control of the main assembly side of the apparatus.
Even when the ink container is provided with a lamp, as disclosed in Japanese Laid-open Patent Application 2002-301829, the main assembly side controller has to identify the ink container which is recognized as containing less ink. To do this, it is necessary to identify the ink container to which the signal for turning the right lamp on. If, for example, the ink container is mounted on a wrong position, there is a liability that small ink remaining amount is displayed for another ink container which contains a sufficient amount of the ink. Therefore, for the emission control of the displaying device such as a lamp or the like, it is a premise that mounted of the ink container is specified.
As for the structure for specified the mounted position of the ink container, Japanese Laid-open Patent Application 2001-253087 discloses that configurations of the engaging positions of ink containers are made different depending on the colors of the ink containers. However, in such a case, it is required that ink containers having configurations depending on the colors of the ink to contain with the result of disadvantage in the manufacturing cost which is more significant with the increase of the number of the colors of the ink.
It would be possible that light emission control is carried out for the respective LED of the ink containers, and the emitted light is received by a photoreceptor fixed in the printer, wherein on the basis of the state of the output, the position of the ink container is specified. With such a structure, the LED of the ink container has two functions, namely, to emit the light to notify the user of the state of the ink container and to emit the light to specify the position of the ink container.
Here, the user possibly looks at display portion of the ink container in the printer in various directions. In view of the fact, it is desirable to emit the light in a wide range.
As will be understood from the foregoing, there are contradictory desires, namely, (1) easiness of mounting to the mounting portion, (2) assuring the electrical connection with the mounting portion of the main assembly side of the printer while protecting the electrical connecting portion from the ink, and (3) assured transmission of the light from the emitting portion to the photoreceptor of the printer and to the user.
Accordingly, it is a principal object of the present invention to provide a liquid container and a manufacturing method therefor wherein a mounting mechanism and operation to the mounting portion is simple and easy, while assuring positioning and stable establishment of the electrical connection, and in addition, the light from a light emission device provided in the ink container is transmitted to the user and a photoreceptor of the printer with certainty.
According to an aspect of the present invention, there is provided a liquid container detachably mountable to a mounting portion of an ink jet recording apparatus, said liquid container comprising:
a casing defining a liquid containing chamber; a supply port, provided in said casing, for supplying liquid contained therein to an ink jet head; a first engaging portion engageable with a first locking portion provided in the mounting portion, said first engaging portion being disposed on one side of said casing; a second engaging portion engageable with a second locking portion provided in the mounting portion, said second engaging portion being disposed opposed to another side of said casing, said another side being opposite said one side; a supporting portion for displaceably supporting said second engaging portion; an information storing portion for storing information relating to said liquid container; a contact electrically connectable with a contact provided in said mounting portion; a light emitting portion; a display portion for directing the light emitted from said emitting portion to an outside of said liquid container, wherein said supply port is provided in a side of said casing which is between said one side and said another side, and said contact is disposed in a region of a corner portion between said another side and said side having said supply port, said display portion is disposed adjacent an upper, in use, portion in said another side of said liquid container.
As described above, the present invention makes it possible to make a liquid container, which has a liquid outlet and an information storage means having electrical contacts, simpler in the mechanism for mounting it into the liquid container mount of a device to which it is attached, simpler in the procedure for mounting it, more reliable and accurate in positioning, smaller in the amount of force necessary to mount it, and better in the state of connection between its liquid outlet and the liquid inlet of a device to which it is attached and the state of contact between the electrical contacts of its information storage means and the electrical contacts of the device to which it is attached.
Further, the present invention can structure a combination of a liquid container and the liquid container mount of a device to which the liquid container is to be attached, so that its electrical contacts are protected from the liquid leakage from the liquid container.
These and other objects, features and advantages of the present invention will become more apparent upon a consideration of the following description of the preferred embodiments of the present invention taken in conjunction with the accompanying drawings.
The description will be made as to the preferred embodiment of the present invention in conjunction with the accompanying drawings.
In
The bottom surface of the ink container 1 is provided with an ink supply port 7 for ink supply, which port is connectable with an ink introduction opening of the recording head which will be described hereinafter, by mounting of the ink container 1 to the container holder. A base member is provided on the bottom side of the supporting portion of the supporting member 3 at a position where the bottom side and the front side intersect with each other. The base member may be in the form of a chip or a plate. In the following description, it is called “substrate” 100.
Referring to
As shown by (a) in
An inside of the ink container 1 is divided into an ink reservoir chamber 11 which is provided adjacent the front side c, and a negative pressure generating member accommodating chamber 12 which is provided adjacent the rear side and which is in fluid communication with an ink supply port 7. The ink reservoir chamber 11 and the negative pressure generating member accommodating chamber 12 are in fluid communication with each other through a communication port 13. The ink reservoir chamber 11 contains the ink alone in this embodiment, whereas the negative pressure generating member accommodating chamber 12 accommodates an ink absorbing material 15 (negative pressure generating member which is a porous member in this embodiment) made of sponge, fiber aggregate or the like for retaining the ink by impregnation. The porous member 15 functions to generate such a negative pressure as is sufficient to provide balance with the force of meniscus formed in the ink ejection nozzle of the recording head to prevent ink leakage from the ink ejection portion to the outside and to permits ink ejection by actuation of the recording head.
The internal structure of the ink container 1 is not limited to such a partitioned structure in which the inside is partitioned into the porous member accommodating chamber and the reservoir containing the ink alone. In another example, the porous member may occupy substantially all of the inside space of the ink container. The negative pressure generating means is not limited to the one using the porous member. In another example, the ink alone is contained in a bladder-like member made of elastic material such as rubber or the like which produces tension in the direction of expanding the volume thereof. In such a case, the negative pressure is generated by the tension in the bladder-like member to retain the ink. In a further example, at least a part of the ink accommodation space is constructed by a flexible In a further example, at least a part of the ink accommodation space is constructed by a flexible member, and the ink alone is accommodated in the space, wherein a spring force is applied to the flexible member, by which a negative pressure is generated. Member, and the ink alone is accommodated in the space, wherein a spring force is applied to the flexible member, by which a negative pressure is generated.
As shown in
As shown in, (a) and (b), a light guide portion 121 extends upwardly with a clearance from a front side wall of the outer casing of the ink container from a position where it is faced to the emitting portion 101, and is effective to guide the light. The free end portion thereof constitutes a display portion 122 which is easily seen by the user. The portion from which the light is emergent is called, “display portion” or “emergent portion” In order to suppress attenuation of a light quantity in the travel of light from the emitting portion 101 to the light guide portion 121, the emitting portion 101 is disposed on the substrate 100 so as to face a light incident surface 123 of the light guide portion 121 at a position close thereto (
In this manner, the emitting portion and the display portion are separate from each other, so that display portion is disposed at the front side of the ink container, namely, the upper part of the side having a latch lever, thus facilitating observation of the user. As will be described hereinafter, when the light receiving portion is provided in the main assembly of the printer, the light can be assuredly received from the display portion by the light receiving portion. Since the light guide portion 121 for light connection between the emitting portion and the display portion is provided on the ink container 101, necessity for the wiring lead or the like for electric power supply and signal exchange can be eliminated, and therefore, the emitting portion 101 and the display portion 122 can be disposed at the respective optimum positions at low cost. Thus, the latitude is provided for the disposition of the display portion 122 to meet the user's conveniences, so that user can easily observe the light emission, by which the user can be given predetermined information relative to the ink container 1. By employing an integral molding of the light guide portion 121 with the outer casing of the ink container 1, the manufacturing cost is not increased significantly by the provision of the light guide portion 121.
In this embodiment, an air layer (space) exists between the light guide portion 121 and the front side wall of the outer casing of the ink container forming the ink reservoir chamber 11. It would be considered that light guide portion is fully integral with the front side wall of the outer casing of the ink container, in other words, the front side wall of the outer casing of the ink container is utilized as the light guide portion. However, the structure of this embodiment is advantageous in that light guide to the display portion 122 is efficient. The description will be made as to this point.
In this embodiment, as shown in
As shown in
Here, it is assumed that polypropylene has a refractive index of 1.49 (=n1) in the light guide portion 121. Since the air has a refractive index of 1.00 (=n2), the critical refraction angle from the polypropylene to the air is determined by the following Snell law of refraction:
n1 sin È1=n2 sin È2.
That is, the critical refraction angle is approx. 43°.
Therefore, the light rays which are incident at the incident angle È which is 43° or larger at the point (i) in (b) of
The predetermined information of the ink container (liquid container) 1 mentioned in the foregoing, includes the information as to whether or not the mounting state of the ink container 1 is proper (whether or not the mounting is complete), the information as to the properness of the mounting position of the ink container (whether or not the ink container is mounted at a correct position on the holder determined on the basis of the color of the ink contained therein), and/or the information concerning the ink remaining amount (whether or not the ink remaining amount is enough). Such types of information can be displayed by presence or absence of the light emission, state of light emission (flickering or the like), and so on.
The description will be made as to a manufacturing method of the ink container. An inside of the ink container 1 is divided into an ink reservoir chamber 11 which is provided adjacent the front side, and a negative pressure generating member accommodating chamber 12 which is provided adjacent the rear side and which is in fluid communication with an ink supply port 7. The ink reservoir chamber 11 and the negative pressure generating member accommodating chamber 12 are in fluid communication with each other through a communication port 13. An upper surface of the generating member accommodating chamber is provided with an air vent 12A. The ink container 1 of
Alternatively, the sealing member 11A is dismounted or an injection hole is formed in an ink container casing, after the ink I in the ink container is consumed up, by which the ink can be reinjected into the ink container. As desired, the ink supply port 7 is sealed by a protection cap or a seal tape (unshown) or the like, by which the ink containers 1 can be transported.
The structures described in the foregoing are examples, and proper modification is possible if the emitting portion 101 is used and is able to present the predetermined information relating to the ink container 1 to the recording device and the user. The description will be made as to some modified examples.
In the first embodiment and the modified example, the air layer is provided between the ink reservoir chamber 11 and the light guide portion 121, so that attenuation of the light incident on the emitting portion 101 is suppressed to accomplish improved visualization. This can be accomplished by interposing another member between the ink reservoir chamber 11 and the light guide portion 121.
Here, the refractive index of the polycarbonate is 1.59, and the refractive index of the polytetrafluoroethylene is 1.35. From the Snell law of refraction, the critical refraction angle from the polycarbonate to the polytetrafluoroethylene is approx. 58°, and therefore, the light rays having the incident angles ranging from 58° to 90° reaches the display portion 122 among the light rays emitted from the emitting portion 101.
In this example, the low refractive index member 108 may be replaced with a reflection member made of metal. In the foregoing examples, wherein the use is made with the difference in the refractive index between the materials, the light rays not satisfying the condition of total reflection are transmitted, with the result that total light quantity attenuates more or less. By providing a reflection member, the light rays incident on the incident surface 123 and reaching the reflection member can be substantially completely reflected. By this, the light can be guided efficiently, and the visualization is improved.
With such modified examples, the emitting portion and the display portion are separated, and the light guide portion 121 for optical connection between them is provided on the ink container 101, so that emitting portion 142 and the display portion 122 can be placed at respective optimum positions, at low cost and without necessity of wiring for the electric power supply and signal exchange which might deteriorate the operationality and observation. By doing so, thus, the latitude is provided for the disposition of the display portion 122 to meet the user's conveniences, so that user can easily observe the light emission, by which the user can be given predetermined information relative to the ink container 1.
The modified example of the first embodiment is not limited to those described above. The examples can be further modified within the spirit of the present invention by one skilled in the art. For example, in the foregoing examples, the light guide portion is made of resin material, and the difference in the refractive index between the material and the air contacted thereto is used to guide the light. But, an optical fiber comprising a core and a cladding is usable. In place of the solid light guide portion, a hollow member having an inner reflecting surface (stainless steel pipe) is usable.
Two or more of the foregoing examples may be combined. The surface treatment of the display portion 122 described in conjunction with
This applies to the second embodiment, the third embodiment and the modified examples thereof which will be described hereinafter.
The recording head unit 105 is generally constituted by a holder 150 for detachably holding a plurality (four, in the example shown in the Figure) of ink containers, and a recording head 105 disposed adjacent the bottom side (unshown in
An example of usable recording head 105 comprises a liquid passage constituting a nozzle, an electrothermal transducer element provided in the liquid passage. The electrothermal transducer element is supplied with electrical pulses in accordance with recording signals, by which thermal energy is applied to the ink in the liquid passage. This causes a phase change of the ink resulting in bubble generation (boiling), and therefore, abrupt pressure rise, by which the ink is ejected from the nozzle. An electrical contact portion (unshown) for signal transmission provided on the carriage 203 which will be described hereinafter, and an electrical contact portion 157 of the recording head unit 105, are electrically contacted to each other, so that transmission of the recording signal is enabled to the electrothermal transducer element driving circuit of the recording head 105 through the wiring portion 158. From the electrical contact portion 157, a wiring portion 159 is extended to the connector 152.
When the ink container 1 is mounted to the recording head unit 105, the holder 150 is brought to above the holder 150 ((a) in
When the upper surface of the second engaging portion 6 reaches below the second locking portion 156 provided below the upper end side edge portion by way of the upper end side edge portion of the holder front side, the supporting member 3 displaces in the direction Q′ by the elastic force of the supporting member 3 per se, so that second engaging portion 6 is locked by the second locking portion 156. The structure of the second locking portion 156 is not limited to those described above. The locking portion may be established by providing a space at the upper end side edge portion of the holder front side, and the locking portion may be established by providing the stepped portion as in this embodiment. With this state ((c) in
The above-described uses the principle of “lever” during the mounting process shown in (c) of
Such structure, arrangement and mounting operation are therefore preferable in that such a member is elastically deformed by the relatively large force. When the mounting operation is completed, the first locking portion 155 engaged with the first engaging portion 5 and the second locking portion 156 engaged with the second engaging portion 6 are effective to prevent the ink container 1 from rising away from the holder, and therefore, the restoration of the elastic member is suppressed, so that member is kept in an appropriately deformed elastically.
On the other hand, the pad 102 and the connector 152 (electrical contacts) are made of a relatively rigidity electroconductive material such as metal to assuring satisfy electrical connection property therebetween. On the other hand, an excessive contact force therebetween is not preferable from the standpoint of damage prevention and sufficient durability. In this example, they are disposed at a position as remote as possible from the fulcrum, more particularly, in the neighborhood of the front side of the ink container, in this example, by which the contact force is minimized.
In this example of the embodiment, the substrate 100 is disposed on the inclined surface connecting the bottom side of the ink container 1 with the front side of the ink container 1, namely, at the corner portion therebetween. When the balance of forces only at the contact portion in the state that pad 102 is contacted to the connector 152 immediately before the completion of mounting, is considered, it is such that reaction force (a upward force in the vertical direction) applied by the connector 152 to the pad 102, balancing with the mounting force applied downwardly in the vertical direction, involves a component force of the actual contact pressure between the pad 102 and the connector 152. Therefore, when the user presses the ink container down toward the mounting completion position, an addition of ink container mounting force for electrical connection between the substrate and the connector is small, so that operativity may be quite low.
When the ink container 1 is pressed down toward the mounting completion position where the first engaging portion 5 is engaged with each other, the second engaging portion 6 and the second locking portion 156 are engaged with each other, and there arises a component force (a force sliding the pad 102 on the connector 152) parallel with a surface of the substrate 100 by the urging force. Therefore, a good electrical connection property is provided and assured upon the completion of the mounting of the ink container. In addition, the electrical connecting portion is at a position high from the bottom side of the ink container, and therefore, the liability of the leaked ink reaching there is small. In this embodiment, the ink introduction opening 107 is disposed in the bottom surface of the ink container adjacent the first engaging portion 5, and the pad 102 is disposed at the corner portion the front side away from the first engaging portion, so that user can be protected from the ink at the ink introduction opening 107 during the mounting and demounting manipulation of the ink container.
In this manner, the structure and arrangement of the electrical connecting portion described above is advantageous from the standpoint of the magnitude of the required ink container mounting force, assurance of the electrical contact state and the protection from contamination with the leaked ink.
As described in the foregoing, the ink container can be assuredly mounted at the correct position in the recording device with as simple structure, and the stable electrical connection is assured without influence to the operationality in the ink container mounting by the disposition of the contact pad at the position described above. In addition, the visualization to the user is improved by disposing the display portion which emits the light from the emitting portion to the outside, at the upper part of the front side (the side having the latch lever) of the ink container. Therefore, structure of the present invention is effective to provide various improvement.
The structure of the mounting portion for the ink container in the first embodiment or the modified example is not limited to that shown in
Referring to
As shown by (a) in
On the other hand, as shown by (b) in
With this structure, when the recording head unit 405 is mounted on the carriage 415, as shown by (b) in
As shown in
As shown in
In this embodiment, the recording head (unshown) is in the form of a chip mounted to the recording head unit 105, corresponding to the respective inks. The recording heads scan the recording material by the movement of the carriage 205, during which the recording heads eject the ink to effect the printing. The carriage 205 is capable of slidable engagement with the guiding shaft 207 extending in the moving direction of the carriage 205, and is movable as described above by the carriage motor and the transmission movement mechanism thereof. The recording heads corresponding to the K, Y, M and C (black, yellow, magenta and cyan) inks eject the inks on the basis of ejection data fed from a control circuit provided in the main assembly side through a flexible cable 206. There is provided a paper feeding mechanism including a paper feeding roller, a sheet discharging roller and so on to feed the recording material (unshown) fed from the automatic sheet feeding device 202 to the sheet discharge tray 203. The recording head unit 105 having an integral ink container holder is detachably mounted on the carriage 205, and the respective ink containers 1 are detachably mounted on the recording head unit 105.
During the recording or printing operation, the recording head scan the recording material by the above-described movement, during which the recording heads eject the inks onto the recording material to effect the recording on a width of the recording material corresponding to the range of the array of ejection outlets of the recording head. In a time period between a scanning operation and the next scanning operation, the paper feeding mechanism feeds the recording material through a predetermined distance corresponding to the width. In this manner, the recording is sequentially effected to cover the entire area of the recording material. An end portion of the movement range of the recording head by the movement of the carriage, there is provided an ejection refreshing unit including caps for capping the sides of the recording heads having the ejection outlets. Therefore, the recording heads move to the position of the refreshing unit at predetermined time intervals, and are subjected to the refreshing process including the preliminary ejections or the like.
The recording head unit 105 having a holder portion for each ink container 1, is provided with a connector corresponding to each of the ink containers, and the respective connectors are contacted to the pad of the substrate provided on the ink container 1. By doing so, turning-on and flickering of the respective emitting portions 101 can be controlled in accordance with the predetermined sequence executed by the recording device. Thus, the information relating to the state of the ink container can be notified.
More specifically, after the position of the container exchange, the emitting portion 101 of the ink container 1 containing small amount of the ink is turned on or flickered, and the event can be observed by the user through the light guide portion 121 and the display portion 122. This applies to the respective ink containers 1. In another example of control of the switching of the emitting portion, when the ink container 1 is mounted to the correct position, the emitting portion 101 of the container is lighted on, by which the user can observe the event through the light guide portion 121 and the display portion 122. These controls are executed, similarly to the control for the ink ejection of the recording head, by supplying control data (control signal) to the respective ink containers form the main assembly side control circuit through the flexible cable 206.
The light receiving portion 210 having the light receiving element can be disposed adjacent the end portion which is opposite the position where the above-described refreshing unit is provided. By doing so, the emitting portion 101 is actuated when the display portion 122 of the ink container 1 passes by the light receiving portion while the carriage 205 is moving, and the emitted light can be received by the light receiving portion through the light guide portion 121 and the display portion 122. On the basis of the provision of the carriage 205 when the light is received, it can be discriminated as to whether or not an ink container 1 is mounted and/or whether or not the ink container 1 is mounted at the correct position on the carriage 205. Thus, the display portion 122 not only functions to present the information to the user but also functions to contribute to the detecting operation and the control operation of the recording device. A further preferable Embodiment to accomplish both of them will be described hereinafter in conjunction with a third Embodiment.
In the foregoing Embodiments and classification is, the light guide portion 121 is extended upwardly from the neighborhood of the emitting portion 101 to the display portion 122 which is located at the top end. The description will be made as to examples in which the display portion is located at a position which is more convenient to the user. The same reference numerals as with the foregoing embodiment are assigned to the elements having the corresponding functions, and the detailed descriptions for such elements are omitted for simplicity.
With this structure, similarly to the first Embodiment, the light can be extended to the display portion 322 while suppressing the attenuation all the light incident from the emitting portion 101. Moreover, the light guide portion 321 is curved so as to direct the display portion 322 toward upper right in the Figure, the display portion 322 can be easily observed by the user.
As shown in
This example provides the same advantageous effects as with the first Embodiment. In addition, according to these features example, the operating portion 3M which is to be manipulated by the user is lighted up, therefore, when the user is to be prompted for exchange of the ink container, the object ink container can be to directly recognized, and the portion to be manipulated for the mounting or dismounting of the ink containers can be directly recognized, too. In the order to make the light more visible at the operating portion 3M, the operating portion 3M may be provided with a portion for scattering a proper amount of light.
The structure of bending the optical axis in order to locate the display portion is not limited to curving the light guide portion. The description will be made as to this point.
The description will be made as to the structure and the function off the light guide portion 450 of this example.
As shown in these Figures, the light guide portion 450 each extended up from the position where the bottom side end surface is opposed to the emitting portion 101. Therefore, when the emitting portion 101 emits the light, the light is guided from the end surface of the bottom side of the light guide portion 450 to the inclined surface 451 at the top end portion, and is reflected by an inclined surface 451 to reach an operating portion 3M. Similarly to the example of
The preferable positional relation among the light guide portion 450, the inclined surface 451 and the emitting portion 101 are as follows. It is preferable from the standpoint of supplying a large amount of light that in order for the light emitted by the emitting portion 101 to be guided to the inclined surface 451 by the light guide portion 450, the emitting portion 101 is opposed to the end surface of the bottom side of the light guide portion 450 and on the projected plane of a cross-section of the light guide portion 450 (perpendicular to the optical axis 456 of the light guide portion 450).
In order for the light reflected by the inclined surface 451 to smoothly reach the operating portion 3M, it is preferable that inclination angle of the inclined surface 451 relative to the optical axis 456 is not less than the critical angle so as to totally reflect the light. For example, the light guide portion 450 which is integrally molded with the ink container 1 is made of polypropylene having a refractive index of 1.49, the total reflection condition is determined by Snell law of refraction as follows (refractive index of the air is 1):
1.49 sin È=1.
sin È=1/1.49.
È is nearly equal to 43°.
Thus, the inclination angle relative to the optical axis (=incident angle) is not less than 43°. In this embodiment, the inclination angle is 45° to satisfy the condition of the total reflection. By doing so, the light guided by the light guide portion 450 is totally reflected by the inclined surface 451 and is directed to the operating portion 3M, so that visibility is improved.
In the examples of
In order to efficiently reflect the light, the inclined surface may be constituted by a material exhibiting a high refractive index or a high reflectance, for example, metal foil or the like may be stuck.
Moreover, in another alternative, the operating portion 3M of the supporting member does not function as the display portion, but the light guide portion 450 is extended to a position higher than t operating portion similarly to
The user possibly looks at the display portion in various directions depending on the position of the printer or the like, and therefore, it is desirable to emit the light in a wider range from t display portion. On the other hand, the display portion is not only for the user observation but also for the ink container detecting operation the control of the operation of the recording device, and therefore, a light receiving portion 210 is provided in the recording device as shown in
For example, when the carriage 205 scans relative to t light receiving portion 210, the ink containers and/or the display portion passes by the light receiving portion 210 sequentially. During the passage, it can be checked whether the ink containers are mounted at the correct positions, respectively. More particularly, at the timing when a certain ink container is faced to the light receiving portion 210, the emitting portion of the ink container containing the ink of the color, which container is supposed to be placed at the position facing to the light receiving portion 210, is actuated to light the emitting portion on to emit the light from the display portion. If the light receiving portion 210 receives the light, it is discriminated that ink container is mounted at the correct position, if not, the container is mounted at a wrong position. If the latter is the case, the recording operation is prevented, for example, and prompt the user to open the main assembly cover 201 and remount the ink container at the wrong position by flickering the emitting portion or display portion of the wrongly mounted ink container. By doing so, the inconveniences that color reproduction is not proper because of the erroneous mounting of the ink container or containers, and the inconveniences that no warning is provided for the ink container in which the ink is short, and a warning is erroneously provided for the ink container containing a sufficient amount of the ink.
The light receiving portion 210 used for such ink container detection or control is fixed in the apparatus, while the ink container is carried on the carriage and reciprocated, and therefore, the positional relation relative to the display portion of the ink container is constant during the detecting operation. For this reason, it is preferable that display portion emits the light within a small range as long as the mounting tolerance of the light receiving portion in the recording device permitted, so that density of the light quantity directed to the light receiving portion is maintained sufficiently high, as contrasted to the standpoint of observation by the user.
Thus, the display portion is required to satisfy the contradictory functions. The description will be made as to the embodiment which is intended to meet the contradictory requirements.
Referring to
Here, a relative positional relation of the light receiving portion 210 fixed in the recording device relative to the ink container may vary due to the assembling tolerance of the mounting of the light receiving portion 210. More particularly, referring to
The deviation in the z direction is influential to the change in the distance from the top end portion 552 to the light receiving portion 210 and therefore influential to the detected intensity of the light from the top end portion 552. However, an appropriate threshold setting can be set to permit the change in the light quantity within the range of the tolerance, so that deviation of the light receiving portion 210 in the z direction is not a problem in the ink container detecting operation.
The deviation in the x direction is acceptable by the light receiving portion 210 continuously receiving the light emergent at the top end portion 552 while scanning the carriage with the emitting portion 101 of the ink container 1 emitting the light. More particularly, even if there is a deviation of the light receiving portion in the x direction, the light emission and the light reception are carried out within the range into which the deviation is taken into account, by which the ink container detecting operation can be properly carried out. The portion An is effective to provide a maximum value (peak value) in a curve of change of the received light quantity of the light receiving portion 210. Therefore, it is possible that in consideration of the point of time of the detection of the peak, the subsequent light emission timing of the emitting portion 101 for the detecting operation may be adjusted, by which the deviation in the x direction is compensated for, in effect.
Furthermore, if the portion A has a length in the y direction, which is not less than the position tolerance range of the light receiving portion 210 mounting in the y direction, the light from the top end portion 552 can be received. By doing so, the deviation of the light receiving portion 210 in the y direction is accepted to such an extent that ink container detecting operation can be carried out correctly. With the decrease of the length of the portion A, the density of the light emergent from the end of the light guide portion 550 increases, so that light quantity received by the light receiving portion 210 increases. By this, the influence of external disturbance is minimized to assure the ink container detecting operation. Thus, the length of the portion A can be properly selected in consideration of the mounting position tolerance of the light receiving portion 210 and the preferable light quantity received by the light receiving portion 210.
On the other hand, top end portion 552 of the light guide portion (display portion) is lighted on or flickered upon shortage of the ink container, for example, and is observed by the user. Therefore, the emergent region is desirably so wide that user can look at it from various positions at various angles. The above-described portion An is effective to permit proper detecting operation of the light receiving portion by selecting the dimension and the configuration. On the other hand, the portion B can provide a sufficiently wide emergent region of the light by selecting the dimension and the configuration. The top end portion 552 of the light guide portion 550 extends also in the widthwise direction of the ink container 1 so that light can be emergent widely in the widthwise direction. By this, the visible area is increased.
In this example, the light guide portion has a T-shaped cross-section. But, this is not limiting, and the configuration of the light guide portion may be different if the configuration and the dimension are so selected that emergent light at t top end portion 552 is enough. The top end portion may be other than the T-shaped.
The configuration of the light guide portion 580, similarly to
In
In this example, the light receiving portion 210 is disposed such that emergent light is received at the front side (y direction) not at the upper part (z direction) of the ink container. In such a case, the deviations of the light receiving portion 210 arise in the x, y and z directions, similarly to the foregoing. According to this example, too, the configuration of the light guide portion 550 permits the deviations in such directions and still permits correct ink container detecting operation for discriminating the properness of the state of the mounting of the ink containers and the properness of the mounting positions thereto.
Here, the deviation in the y direction corresponds to the deviation in the z direction in the foregoing example, and is influential to the change in the distance from the emergent position of the light to the light receiving portion 210, but the deviation is acceptable by an appropriate threshold setting to permit the change in the light quantity so that correct ink container detecting operation is accomplished.
The deviation in the x direction is the same as the deviation in the x direction, and can be accepted by the light receiving portion 210 continuously receiving the light of the top end portion 552 while scanningly moving the carriage with the emitting portion 101 of the ink container 1 emitting the light.
Furthermore, the deviation in the z direction corresponds the deviation in the y direction in the foregoing example. If the length of the portion D measured in the z direction as seen from t front side, is not less than the mounting position tolerance range of the light receiving portion 210 in the z direction, the light from the top end portion 582 can be received, so that mounting of the light receiving portion 210 in the z direction is acceptable, and the positive ink container detecting operation is accomplished.
Similarly to the foregoing example, the dimension, configuration and or the like of the respective portions D, E can be determined in consideration of the operation of the light receiving portion and the user's observation.
In place of providing the display portion by the top front side position of the light guide portion 580 where t light is emergent, the inclined surface 582 is disposed behind t operating portion 3M of the supporting member 3, as shown in
It is desirable that user can correctly determine the ink container from the display portion of which the light is emitted. If the emergent light quantity is too low, it is not easy for the user to detect the light. If, on the other hand, the emergent light quantity is too large, the distinction between adjacent liquid containers is difficult. The same applies to the light receiving portion. More particularly, the light receiving portion might receive the light from an adjacent ink container not the intended ink container.
The description will be made as to an embodiment in which the emergent light from the display portion is properly received by the user and also by the light receiving portion.
The structure of this example is basically the same as with
Designated by reference numeral 2 is a cap member which is mounted to the upper surface of the ink container 1 to cover the inside and which has an air vent 20 for fluid communication between the inside and the ambience. In this example, the emergent light limitation member 21 is made of thermoplastic elastomer, for example, by which it can be welded on the cap member 2 to provide an integral member. Since the thermoplastic elastomer is transparent, it may be colored so as to reduce the emergent light at the periphery portion to stabilize the receiving operation of the light receiving portion 210 and improvement in the user visibility. Or, a material other than elastomer is usable, and it may be integrally molded with the cap member 2 by the same material. When the cap member 2 is made of a transparent, the emergent light may be limited by providing unsmoothness configuration on at least one of the front and back surfaces of the portion constituting the emergent light limitation member 21, or the surface may be subjected to a blast treatment.
According to this embodiment, the emergent light from the display portion is appropriately limited, by which the light quantity can be made preferable for both of the user visibility and operation stabilization of the light receiving portion. The light guide portion is not limited to those described hereinbefore, and the configuration may be different from that of
5.1 General Arrangement (
In
As schematically shown in
Each of the ink container 1, as described hereinbefore, is provided with the substrate 100 provided with the LED 101, the display control circuit therefor and the pad (electric contact) or the like. When the ink container 1 is correctly mounted on the recording head unit 105, the pad on the substrate 100 is contacted to the connector provided corresponding to each of ink containers 1 in the recording head unit 105. The connector (unshown) provided in the carriage 205, the control circuit 300 provided in the main assembly side, are electrically connected for transmission of signals through the flexible cable 206. Furthermore, by the mounting of the recording head unit 105 on the carriage 205, the connector of the carriage 205 and the connector of the recording head unit 105 are electrically contacted with each other for signal transmission. With such a structure, the signals can be transmitted between the control circuit 300 of the main assembly side and the respective ink containers 1. Thus, the control circuit 300 can perform the control for turn-on and -off of LED in accordance with the sequence which will be described hereinafter in conjunction with
The control of ink ejections of the recording heads 105K, 105Y, 105M and 105C, is carried out similarly through the flexible cable 206, the connector of the carriage 205, the connector of the recording head unit with the signal connection between the driving circuit and so on provided in the recording head, and the control circuit 300 in the main assembly side. Thus, the control circuit 300 controls the ink ejections and so on for the respective recording heads.
The first light receiving portion 210 disposed adjacent one of the end portions of the movement range of the carriage 205 receives light from the LED 101 of the ink container 1, and a signal indicative of the event is supplied to the control circuit 300. The control circuit 300, as will be described hereinafter, responds to the signal to discriminate the position of the ink container 1 in the carriage 205. In addition, an encoder scale 209 is provided along the movement path of the carriage 205, and the carriage 205 is correspondingly provided with an encoder sensor 211. The detection signal of the sensor is supplied to the control circuit 300 through the flexible cable 206, by which the movement position of the carriage 205 is obtained. The position information is used for the respective recording head ejection controls, and is used also for light validation process in which the positions of the ink containers are detected, which will be described hereinafter in conjunction with
5.2 Connecting Portion (
As shown in
Each of the substrates 100 of the ink containers 1 has a controller 103 which is responsive to the signal supplied through the four signal lines, and a LED 101 actuatable in response to the output of the controller 103.
A LED driver 103C functions to apply a power source voltage to the LED 101 to cause it to emit light when the signal supplied from the I/O control circuit 103A is at a high level. Therefore, when the signal supplied from the I/O control circuit 103A is at a high level, the LED 101 is in the on-state, and when the signal is at a low level, the LED 101 is in the off-state.
As shown in
As shown in the Figure, the color information has a code corresponding to each colors of the ink, K, C, M and Y. The I/O control circuit 103A compares the color information indicated by the code with the color information stored in the memory array 103B of the ink container per se. Only if they are the same, the subsequent data are taken in, and if not, the subsequent data are ignored. By doing so, even when the data signal is supplied commonly to all of the ink containers from the main assembly side through the common signal line DATA held in
As shown in
The content indicated by the control code is not limited to the example described above, and, for example, control codes for verification command and/or continuous reading command may be added.
For the reading operation, the structure of the data signal is the same as in the case of the writing operation. The code of the start code plus color information is taken by the I/O control circuit 103A of all of the ink containers, similarly to the case of the writing operation, and the subsequent data signal are taken in only by the I/O control circuit 103A of the ink container having the same color information. What is different is that. The read data are outputted in synchronism with rising of the first clock (13th clock in
As shown in
In the example of this Figure, the black (K) ink container which the leftmost data signal designates is first identified, and then, the LED 101 of the black ink K container is switched on. Then, the color information of the second data signal indicates magenta ink M, and the control code indicates actuation, and therefore, the LED 101 of the ink M container is switched on while the LED 101 of the ink K container is kept in ON state. The control code of the third data signal means instruction of deactuation, and only the LED 101 of the ink K container is deactuated.
LED As will be understood from the foregoing description, the flickering control of the LED is accomplished by the control circuit 300 of the main assembly side sending repeated actuation and deactuation control codes alternately for the identified ink container. The cyclic period of the flickering can be determined by selecting the cyclic period of the alternating control codes.
5.3 Control Process (
The process shown in
If the result of the discrimination is affirmative, step S203 is executed for ink container mounting confirmation control.
In step S302, a variable An of the flag relating to the order of mounting discrimination for the ink container is set to “1”, and in step S303, the mounting confirmation control is effected for the Ath ink container. In this control, the contact 152 of the holder 150 and the contact 102 of the ink container are contacted with each other by the user mounting the ink container to the right position in the holder 150 of the recording head unit 105, by which the control circuit 300 of the main assembly side, as described hereinbefore, identifies the ink container by the color information (individual information for the ink container), and the color information stored in the memory array 103B of the identified container is sequentially read out. The color information for the identification is not used for the already read out one or ones. In this control process, the discrimination is also made as to whether or not the read color information is different from the color information already read out after the start of this process.
In step S304, if the color information have been able to read out, the color information has been different from the already read out piece or pieces of information, it is then discriminated that ink container of the color information is mounted as the A-th ink container. Otherwise, it is discriminated that A-th ink container is not mounted. Here, the “A-th” represents only the order of discrimination of the ink container, does not represent the order indicative of the mounted position of the ink container. A When the A-th ink container is discriminated as being correctly mounted, the flag F (A) (the flag satisfying k=An among the prepared flags flag F (k), k=1-4) is set to “1” in step S305, as described hereinbefore in conjunction with
Then, in step S306, the variable An is incremented by 1, and in step S307, the discrimination is made as to whether or not the variable An is larger than N set in the step S301 (in this embodiment, N=4). If the variable An is not more than N, the process subsequent to step S303 is repeated. If it is discriminated as being larger than N, the mounting confirmation control has been completed for all of four ink containers. Then, in step S308, the discrimination is made as to whether or not the main assembly cover 201 is in an open position on the basis of an output of the sensor. When the main assembly cover is in a closed state, an abnormality state is returned to the processing routine of
When, on the contrary, the main assembly cover 201 is discriminated as being open in the step S308, the discrimination is made as to whether or not all of the four flags F (k), k=1-4 are “1.”, that is, whether the LEDs 101 are all switched on or not. If it is discriminated that at least one of the LEDs 101 is not switched on, the process subsequent to the step S302 is repeated. Until the user mount or correctly remount the ink container or ink containers of which the LEDs 101 are not switched on, the LED of the ink container or containers is switched on, and the process operation is repeated.
When all of the LEDs are discriminated as being switched on, a normal ending operation is carried out in step S310, and this process operation is completed. Then, the process returns to the processing routine shown in
Referring back to
In
When the proper mounting or demounting process is discriminated in step S102, the process waits for the user to close the main assembly cover 201 in step S103, and the discrimination is made as to whether or not the cover 201 is closed or not in step S104. If the result of the discrimination is affirmative, the operation proceeds to light validation process of step S105. In this case, if the closing of the main assembly cover 201 is detected as shown by (b) in
The light validation process is intended to discriminate whether or not the properly mounted ink containers are mounted at the correct positions, respectively. In this embodiment, the structures of the ink containers are not such that configurations thereof are made peculiar depending on the colors of the ink contained therein for the purpose of preventing the ink containers from being mounted at wrong positions. This is for the simplicity of manufacturing of the ink container bodies. Therefore, there is a possibility that ink containers are mounted at wrong positions. The light validation process is effective to detect such wrong mounting and to notify the user of the event. By this, the efficiency and low cost of the ink container manufacturing are accomplished since it is not required to make the configurations of the ink containers different from each other depending on the colors of the ink.
As shown by (a) in
While moving the carriage 205, as shown by (b) in
On the contrary, if a cyan ink container 1C is erroneously mounted at a position for a magenta ink container 1M, as shown by (b) in
In this manner, the light validation process with the control circuit 300 described above is effective to identify the ink container or ink containers not mounted at the correct position. If the mounting position does not have the correct ink container mounted thereto, the color of the ink container erroneously mounted there can be identified by sequentially actuating the LEDs of the other three color ink containers.
In this embodiment, as described in conjunction with
In step S402, the discrimination is made as to whether the remaining ink amount is sufficient to the printing or not, on the basis of the confirmation process. If the ink amount is sufficient, the operation goes to the printing in step S403, and the displaying device of the operating portion 213 is lighted green at step S404 (normal ending). On the other hand, if the result of the discrimination at the step S402 indicates a shortage of the ink, the displaying device of the operating portion 213 is flickered orange in the step S405, and in step S406, the LED 101 of the ink container 1 containing the insufficient amount of the ink is flickered or switched on (abnormal ending). When the recording device is connected with a host PC which controls the recording device, the ink remaining amount may be displayed on the display of the PC, simultaneously.
In this embodiment, substrates 100-2 each having a light emitting portion 101 such as a LED is provided on the top portion of ink container front side. Thus, in this embodiment, the emitting portion 101 functions also as the display portion of the foregoing embodiment. Similarly to the foregoing embodiment, the substrate 100 is provided on an inclined surface portion since doing so is preferable from the standpoint of satisfy connection with the carriage side connector 152, the protection from the ink, and the substrate 100 is connected with the substrate 100-2 or the light emitting portion 101 by wiring portion 159-2 so that electric signal can be transmitted therebetween. Designated by 3H is a hole formed in a base portion of a supporting member 3 to extend the wiring portion 159-2 along the ink container casing.
In this embodiment, when the light emitting portion 101 is actuated, the light is directed toward the front side. A light receiving portion 210 is disposed at a position for receiving the light which is directed to the right in the Figure adjacent an end of the scanning range of the carriage, and when the carriage faces such a position, the light emission of the light emitting portion 101 is controlled, so that recording device side can obtain the predetermined information relating to the ink container 1 from the content of the received light by the light receiving portion. When the carriage is at the center portion of the scanning range, for example, the light emitting portion 101 is controlled, by which the user is more easily able to see the state of lightening so that predetermined information relating to the ink container 1 can be recognized by the user.
In the structure shown in
With the structure of said
In the foregoing embodiment, the liquid supply system is so-called continuous supply type wherein an amount of the ink ejected out is substantially continuously supplied to the printing head with the use of an ink container separably mounted to the recording head which reciprocates in a main-scanning direction. However, the present invention is applicable to another liquid supply system, wherein the ink container is integrally fixed to the recording head. Even with such a system, if the mounting position is not correct, the recording head receives data for another color, or the order of different color ink ejections is different from the predetermined order with the result of deteriorated recording quality. When the ink container integral with the head is mounted to or demounted from the recording device, the ink leaked from the recording head might be deposited on the contact pad. This possibility should be taken into consideration.
The I/O control circuit 103A actuates the LED 101 in response to the control data supplied from the control circuit 300 provided in the main assembly side through the flexible cable 206.
A LED driver 103C functions to apply a power source voltage to the LED 101 to cause it to emit light when the signal supplied from the I/O control circuit 103A is at a high level. Therefore, when the signal supplied from the I/O control circuit 103A is at a high level, the LED 101 is in the on-state, and when the signal is at a low level, the LED 101 is in the off-state.
This embodiment is different from the first embodiment in that there is not provided a memory array 103B. Even if the information (color information, for example) is not stored in the memory array, the ink container can be identified, the LED 101 of the identified ink container can be actuated or deactuated.
Referring to
An I/O control circuit 103A of the controller 103 of the ink container 1 receives start code plus color information, control code is supplied with clock signal CLK, from the main assembly side control circuit 300 through a signal line DATA (
The command discrimination portion 103D, as shown in
As a further alternative, the command including the color information and the control code sent from the main assembly side control circuit 300 to the ink container 1 may not be directly compared with the color information (individual information) in the ink container. In other words, the inputted command is converted or processed in the controller 103, and the value provided as a result of the conversion is compared with the predetermined value stored in the memory array 103B or the command discrimination portion 103D inner, and only when the result of the comparison corresponds to the predetermined relation, the LED is actuated or deactuated.
As a further alternative, the signal sent from the main assembly side is converted or processed in the controller 103, and the value stored in the memory array 103B or the command control portion 103D is also converted or processed in the controller 103. The converted ones are compared, and only when the result of the comparison corresponds to the predetermined relation, the LED is actuated or deactuated.
In the foregoing embodiments, the description has been made with the ink containers containing yellow ink, magenta ink, cyan ink and black ink. However, the used color or color tone is not limited to these examples, and the number of the ink containers is not limited to those of the examples. In addition to such inks, special color ink such as light color ink, red ink, green ink, blue ink or the like is usable. With the increase of the number of the ink containers, the liability of the erroneous mounting of the ink container increases, and the visibility and/or mounting and demounting property is deteriorated by the increasing wiring lead and connecting portions, so that effectiveness of the present invention increases.
While the invention has been described with reference to the structures disclosed herein, it is not confined to the details set forth and this application is intended to cover such modifications or changes as may come within the purpose of the improvements or the scope of the following claims.
This application claims priority from Japanese Patent Applications Nos. 435940/2003, 435942/2003, 306128/2004 and 329699/2004 filed Dec. 26, 2003, Dec. 26, 2003, Oct. 20, 2004 and Nov. 12, 2004, which is hereby incorporated by reference.
| Number | Date | Country | Kind |
|---|---|---|---|
| 435940/2003 | Dec 2003 | JP | national |
| 435942/2003 | Dec 2003 | JP | national |
| 306128/2004 | Oct 2004 | JP | national |
| 329699/2004 | Nov 2004 | JP | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11017084 | Dec 2004 | US |
| Child | 11723551 | Mar 2007 | US |
