JP2008307881A - Recording liquid storage container, recorder and recording liquid remaining amount decision method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a means easily detecting the presence/absence of a recording liquid in a recording liquid storage container and detecting the process of the remaining amount of the recording liquid. <P>SOLUTION: A recorder includes: the recording liquid storage container which is detachably attached to the recorder for recording on a recording medium and stores the recording liquid supplied to the recorder; a communication means which is provided in the recording liquid storage container and changed in position according to the amount of the recording liquid stored in the recording liquid storage container; a communication antenna which performs radio communication with the communication means; a pseudo-antenna which takes an electromagnetic interaction with the communication means, to have influence on the success and failure of the communication of the communication means, according to the position of the communication means; and a control means which decides the amount of the recording liquid stored in the recording liquid storage container from the success and failure of the communication of the communication means. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a recording liquid storage container, a recording apparatus, and a recording liquid remaining amount determination method, and more particularly to a recording liquid remaining amount determination mechanism of an ink jet recording apparatus.

  2. Description of the Related Art Conventionally, in an ink jet recording apparatus that performs recording using recording liquids of a plurality of colors, an apparatus in which a plurality of recording liquid storage containers each filled with a recording liquid of each color is mounted as an example is known. . In this ink jet recording apparatus, since it is possible to replace only a specific recording liquid storage container according to the usage frequency of the recording liquid, it is possible to use up the recording liquid for each color without waste, and it is excellent in economy. It has the characteristics.

  In such an ink jet recording apparatus, the recording liquid storage container is provided with a spring in the bag-shaped recording liquid storage portion, and applies a force to resist the inward deformation of the bag due to the lead-out of the recording liquid. (Patent Documents 1 and 2, etc.) are known. A recording liquid supply path for guiding the recording liquid from the recording liquid storage container to the recording head is provided for each color individually. Then, in the control unit or the like on the ink jet recording apparatus main body side, color printing is realized by performing printing control such as recording liquid ejection in the recording head for each color.

  The print quality in the ink jet recording apparatus depends greatly on the viscosity of the recording liquid, the degree of bleeding on the recording medium, and the like, in addition to the resolution of the recording head. For this reason, improvements in recording liquid characteristics and drive signals supplied to the recording head have been carried out with the aim of improving printing quality. Furthermore, improvements have been made to the idle discharge cycle for preventing clogging of the nozzle openings and maintenance conditions such as forced discharge in the capping state.

  For this reason, a configuration has been proposed in which a storage chip storing data related to the recording liquid storage container is provided in the recording liquid storage container and communicates with the recording apparatus. For example, it is used to read out these data from a recording device and perform printing under optimum conditions, or to store data relating to the usage state of the recording liquid storage container in a storage chip.

  Further, as seen in Patent Document 3 and the like, as one configuration of the semiconductor memory chip, a configuration in which information communication between the recording liquid storage container and the printer main body is performed in a non-contact manner by radio waves is disclosed. In the case of wireless communication, since communication is possible even in a packaging form, there is an advantage that it can be used for various purposes such as merchandise management at the time of distribution in addition to the above-described uses.

  In general, a wireless communication system called a wireless tag or RFID can be used as a medium frequency band of 135 kHz or less, a short wave band of 13.56 MHz, a UHF band of 860 to 960 MHz, a microwave band of 2.45 GHz. and so on. The medium and short wave bands use the electromagnetic induction phenomenon caused by the magnetic field generated by the reader / writer, and the UHF band and microwave band use the electric field energy of the carrier wave for power generation. The 13.56 MHz short wave band uses the electromagnetic induction phenomenon and thus has a short communication distance. However, since it can be manufactured at a relatively low cost, it is currently the most popular method. When there are a plurality of tags within the communication distance range, individual communication is possible by a so-called anti-collision function. However, when the tags overlap each other at a short distance, the mutual inductance between the tags increases and the resonance frequency shifts, so that a phenomenon may occur in which the induced electromotive force is not sufficiently obtained and communication becomes impossible.

  On the other hand, in the conventional ink jet recording apparatus, as means for detecting the remaining amount of the recording liquid in the recording liquid storage container, for example, electrodes are provided at two positions in the recording liquid storage container, and the resistance value between the two electrodes is set. A method for detecting the remaining amount of the recording liquid by detecting this is known. Besides, a method for detecting the remaining amount of the recording liquid by means for measuring the weight of the recording liquid (gravity sensor or the like) or a means for optically detecting the recording liquid in the recording liquid storage container (photo interrupter sensor or the like) ) To detect the remaining amount of the recording liquid.

Patent Document 4 discloses a configuration in which flat plate coil members are formed on both parallel surfaces of a foldable recording liquid storage bag having a pleated structure on the side surface. One coil is energized, the induced voltage of the other coil is measured, and the degree of crushing of the recording liquid storage bag, that is, the recording liquid remaining amount is detected based on the voltage level.
JP 56-67269 A JP-A-6-226993 Japanese Patent Laid-Open No. 11-320914 Japanese Patent Laid-Open No. 10-337878

  However, the conventional ink jet recording apparatus described above requires a dedicated electrode member or coil member for detecting the remaining amount of the recording liquid in the recording liquid storage container in the electrode method and the induction method, and the recording liquid storage container costs increase. There's a problem. In the gravimetric method, the measurement mechanism including the weight sensor is complicated and large, and the cost becomes high. In addition, the optical method requires a transparent or translucent prism-like member, and is restricted by the recording liquid storage container material and shape.

  When the physical recording liquid remaining amount detecting means cannot be provided, a means for counting the cumulative number of ejected recording droplets and converting the recording liquid consumption into the recording liquid consumption may be used. However, the recording droplet counting method is only used as a rough guide because it is not highly accurate due to variations in the initial recording liquid injection volume and recording droplet volume. For this reason, the user runs out of recording liquid in the middle of printing, and in order to avoid this, there is a disadvantage that the recording liquid remains and is replaced with a new recording liquid storage container. Against this background, there has been a demand for a recording liquid remaining amount detection method that is versatile, simple, and low in cost.

  The present invention has been made in view of the above-described problems, and an inkjet recording apparatus capable of accurately determining the presence or absence of a recording liquid in a configuration including a recording liquid storage unit that stores recording liquid information. The purpose is to provide. More preferably, an object of the present invention is to provide an ink jet recording apparatus capable of detecting the progress of the remaining amount of the recording liquid.

  In order to solve the above problems, the present invention provides a recording liquid storage container that is detachably attached to a recording apparatus that performs recording on a recording medium, and stores a recording liquid supplied to the recording apparatus, and the recording liquid storage container A communication means that changes position depending on the amount of recording liquid stored in the recording liquid storage container, a communication antenna that performs wireless communication with the communication means, and electromagnetically interacts with the communication means. A pseudo antenna that affects the success or failure of communication of the communication means according to the position of the communication means, and a control means for determining the amount of the recording liquid stored in the recording liquid storage container from the success or failure of the communication of the communication means And a recording apparatus.

  Further, the present invention provides a communication for receiving recording liquid from a recording liquid storage container that is detachably mounted, recording on a recording medium, and performing wireless communication with communication means provided in the mounted recording liquid storage container. An antenna, a pseudo-antenna that interacts electromagnetically with the communication means, and affects the success or failure of communication of the communication means according to the position of the communication means, and the recording liquid storage from the success or failure of communication of the communication means A recording liquid storage container mounted on a recording apparatus having a control means for determining the amount of the recording liquid stored in the container, the recording liquid storage container being provided in the recording liquid storage container and stored in the recording liquid storage container A recording liquid storage container comprising the communication means whose position changes according to the amount of liquid.

Furthermore, the present invention can be equipped with a recording liquid storage container having communication means whose position changes according to the amount of recording liquid to be stored, and performs recording on a recording medium with the recording liquid supplied from the recording liquid storage container. In the recording device,
A communication antenna that performs wireless communication with the communication unit and electromagnetically interacts with the communication unit whose position has changed due to a decrease in the recording liquid stored in the recording liquid storage container. And a control unit that determines the amount of the recording liquid stored in the recording liquid storage container from the success or failure of the communication of the communication unit. is there.

  Further, the present invention provides the communication means, the communication antenna for performing wireless communication with the communication means, the means for moving to shift the relative position of at least one element of the pseudo antenna, and the amount of movement A recording apparatus.

  According to the present invention, it is possible to accurately determine the presence / absence of a recording liquid in a configuration that includes a means for storing recording liquid information in a recording liquid storage container. In addition, the remaining amount of the recording liquid in the process of consumption can be detected almost accurately.

  The present invention can be suitably applied to an inkjet printing apparatus that uses ink as a recording agent applied to a recording medium, a printing system including the inkjet printing apparatus, and a recording liquid storage container that stores ink as a recording agent. Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic perspective view of a recording liquid storage container 1 that is detachably attached to a recording apparatus main body according to a first embodiment of the present invention. The recording liquid storage container 1 is at least partially formed of a flexible sheet member. That is, the recording liquid storage container 1 includes a sealed structure in which a flexible sheet member 22 as a movable member is welded to an opening portion of a square frame frame 2 formed of resin. The lid member 10 is fitted and welded to the frame 2 to protect the sheet member 22. An air introduction hole 11 is formed in the lid member 10.

  FIG. 2 is a side sectional view of the recording liquid storage container 1. The recording liquid storage unit 15 formed by the frame 2 and the sheet member 22 includes a coiled spring 20 as a spring member and a flat pressure as a surface member for transmitting the spring force evenly to the sheet member surface. The board 21 is comprised. A recording liquid supply port 7 that communicates with the recording liquid storage unit 15 is formed in the frame 2. The recording liquid held in the recording liquid storage unit 15 is supplied from the recording liquid supply port 7 to the recording head. The sheet member 22 is attached with a communication module 100 which is a communication unit that performs two-way wireless communication with the recording apparatus main body.

  The latch lever 3 is formed of a resin integrally with the frame 2 and is configured to be displaceable around the supported portion when performing an operation of mounting the recording liquid storage container holder or the like. The left and right outer walls of the recording liquid storage container 1 are respectively provided with a first engaging part 5 and a second engaging part 6 (in this example, the latch lever 3 which can be engaged with a locking part of a recording liquid storage container holder described later). Integrated). With these engagements, the recording liquid storage container 1 is mounted and held on the recording liquid storage container holder.

  FIG. 3 is a side sectional view showing a state in which the recording head unit 405 and the recording liquid storage container 1 are mounted on the carriage in the recording apparatus according to the first embodiment of the present invention. Although not shown, recording liquid storage containers corresponding to a plurality of recording liquid colors are arranged in parallel in the depth direction of the figure. The first engagement portion 5 and the second engagement portion 5 of the recording liquid storage container 1 with respect to the first engagement portion 455 provided in the recording head unit 405 and the second engagement portion 256 provided in the recording liquid storage container holder 220. The engaging portions 6 are engaged with each other. Thereby, the recording liquid storage container 1 is mounted and fixed to the head unit 405 and the recording liquid storage container holder 220.

  In FIG. 3, the carriage is stationary at a predetermined wireless communication position, and is provided with a main body communication antenna 215 fixed to the printer main body by a fixing member (not shown). The communication antenna 215 is connected to a communication unit configured on a control circuit on the main body side described later. The communication unit can individually communicate with the communication module 100 provided in the plurality of recording liquid storage containers by moving the carriage. The communication method uses an electromagnetic induction method of 13.56 MHz band.

  In a communication area sandwiched between the main body communication antenna and the communication module 100, a pseudo antenna 217 is fixed in the vicinity of the main body communication antenna. The pseudo antenna 217 of the present embodiment is formed to be approximately equal in size and shape to an in-module antenna (described later) formed in the communication module 100. The main body communication antenna, the communication module, and the pseudo antenna are arranged so that the projection planes overlap each other. The pseudo antenna 217 is connected to a switch circuit (described later) provided on the main body control circuit, and the switch of the antenna circuit is switched by the switch circuit.

  FIG. 4 is a plan view for explaining the configuration of the communication module 100 provided in the recording liquid storage container. In the communication module, a circuit chip 130 and an in-module antenna 140 formed of a copper foil, an aluminum foil or the like are mounted on a base sheet 101 formed of a PET film, a PEN film or the like, and a cover sheet is further laminated. .

  As illustrated in FIG. 5, the circuit chip 130 includes a storage circuit 134 that is a storage unit including a power circuit 137, a control circuit 135, a flash memory, and the like via an RF circuit 138 connected to the in-module antenna 140. Have.

  The RF circuit 138 is a circuit that detects and inputs an AC signal (current) generated by electromagnetic induction to an in-module antenna 140 (first coil antenna) that is a coil antenna. The RF circuit 138 outputs the power component extracted by detection to the power supply circuit 137 and the signal component to the control circuit 135. The communication module 100 is operated by electric power obtained from a current generated by electromagnetic induction in the in-module antenna 140 (first coil antenna). The RF circuit 138 also has a function of receiving a signal from the control circuit 135, modulating it into an AC signal, and transmitting it to the printer body via the in-module antenna 140.

  The in-module antenna 140, the RF circuit 138, and the power supply circuit 137 generate power by electromagnetic induction, and the control circuit 135 transmits and receives predetermined information as radio waves by the power supplied from the power supply circuit 137. In addition, the control circuit 135 performs internal operation control including read / write operations for the storage circuit 134.

  In the storage circuit 134, product type identification data of the recording liquid storage container, product type identification data of the printer body, unique ID data of the recording liquid storage container, date of manufacture and expiration date, remaining amount of recording liquid, etc. Information is stored (not shown).

  FIG. 6 is a view showing the appearance of the inkjet printer 200 according to the present invention, and is a perspective view showing a state in which the main body cover 201 is opened. As shown in FIG. 6, the printer 200 according to the present embodiment includes a recording head and four types of black, cyan, magenta, and yellow (hereinafter abbreviated as “K”, “C”, “M”, and “Y”). A carriage 205 on which recording liquid storage containers 1K, 1C, 1M, and 1Y are mounted is provided. Also, the main part of the printer, such as a mechanism in which the carriage 205 moves for scanning and performs recording, is covered with the main body cover 201 and other case parts.

  A front surface of the printer main body is provided with a paper discharge unit (not shown) provided with a paper discharge roller, and a paper discharge tray 203 subsequent thereto. An automatic paper feeder (ASF) 202 is provided on the back of the main body. Further, an operation panel 213 provided with a display for displaying the status of the printer in both the closed state and the open state of the main body cover, a power switch, and a reset switch is provided.

  FIG. 7 is a block diagram showing a control configuration of the above-described inkjet printer, and mainly shows a main body control circuit 300 in the form of a PCB (recording wiring board) in the printer main body and a configuration controlled thereby.

  In FIG. 7, the main body control circuit 300 executes data processing and operation control relating to the printer. Specifically, the CPU 301 executes processing related to printing according to a program stored in the ROM 303. The RAM 302 is used as a work area when the CPU 301 executes processing.

  As schematically shown in FIG. 7, the recording head unit 405 mounted on the carriage 205 has a plurality of ejections for ejecting recording liquids “K”, “C”, “M”, and “Y”. Each recording head (not shown) is provided with an outlet. The recording liquid storage containers 1K, 1C, 1M, and 1Y are detachably mounted on the recording head unit 405 and the recording liquid storage container holder 220 corresponding to these recording heads.

  A connector (not shown) provided on the carriage 205 and the main body control circuit 300 are connected to each other via a flexible cable 206. Further, when the recording head unit 405 is mounted on the carriage 205, the connector of the carriage 205 and the connector of the recording head unit 405 are signal-connected. Similarly, the drive circuits provided in the respective recording heads are also signal-connected to the main body control circuit 300 via the connector of the recording head unit, the connector of the carriage 205, and the flexible cable 206. As a result, the main body control circuit 300 can control the recording droplet ejection and the like in each recording head.

  An encoder scale 209 is provided along the movement path of the carriage 205, and an encoder sensor 211 is provided on the carriage 205. The detection signal of this sensor is input to the main body control circuit 300 via the flexible cable 206, and thereby the movement position of the carriage 205 can be known. This position information is used for each print head ejection control.

  In the printer of this embodiment, the recording liquid of each color is supplied to the recording head unit 405, and the recording head unit 405 scans a recording medium such as a sheet by moving the carriage 205. Recording is performed by ejecting recording droplets. That is, the carriage 205 is slidably engaged with the guide shaft 207 extending in the moving direction, and can move as described above while being guided by the guide shaft 207 by the carriage motor and its driving force transmission mechanism. it can. In each of the recording heads corresponding to the recording liquids “K”, “C”, “M”, and “Y”, recording is performed based on ejection data sent from the control circuit 300 on the main body side via the flexible cable 206. Droplet discharge is performed.

  Further, a paper feed mechanism such as a paper feed roller and a paper discharge roller is provided, and a recording medium (not shown) fed from the automatic paper feeder 202 can be conveyed to the paper discharge tray 203. The recording head scans by the above movement, and during that time, recording droplets are ejected from the respective recording heads to the recording medium, and recording is performed in an area having a width corresponding to the ejection port of the recording head. Between this scanning and the next scanning, a predetermined amount of paper is fed according to the width by the paper feeding mechanism, thereby sequentially recording on the recording medium.

  A main body communication antenna 215 for performing wireless communication with the communication module 100 provided in the recording liquid storage container is provided at a predetermined position within the carriage movable range. The main body communication antenna 215 is connected to a wireless communication unit 304 configured on the main body control circuit 300. A pseudo antenna 217 is provided at a predetermined position above the main body communication antenna, and is connected to the switch circuit 305 in the wireless communication unit.

  FIG. 8 is an example of a data configuration for explaining access data transmitted from the wireless communication unit 304 to the communication module 100 when accessing the communication module 100. Example 1 is an example of a data structure related to reading of a unique ID, and transmits data signals of “start code + color code” and “control code”. “Start code + color code” means the start of a series of data signals by the “start code” signal, and the recording liquid type that is the target of this series of data signals by the “color code” signal. Identify. Here, the “color” of the recording liquid includes not only recording liquid colors such as Y, M, and C but also recording liquids having different concentrations.

  The “color code” has codes corresponding to the recording liquid colors “K”, “C”, “M”, and “Y”. In the communication module 100 that has received the access data, the control circuit 135 shown in FIG. 4 compares the color information indicated by this code with its own color information stored in the storage circuit 134. The control circuit 135 performs a process of fetching the subsequent data signal only when the received color code and its own color information stored in the storage circuit 134 match. Performs processing to ignore signal capture. As a result, even if a data signal is sent from the main body side to each recording liquid storage container in common, the recording liquid type can be specified by including the color information described above in the data signal, It is possible to carry out only for the recording liquid type.

  In the unique ID reading operation, the “start code + color code” code is taken in by the communication module 100 of all the recording liquid storage containers, and the “INVENTORY” code is the control of the recording liquid storage container whose “color code” matches. Only circuit 135 (FIG. 4) captures. The control circuit 135 that has received the “INVENTORY” code returns the unique ID stored in the storage circuit 134.

  Example 2 is an example of writing to the storage circuit 134. As shown in FIG. 8, "start code + color code", "control code", "unique ID code", "address code", "data code" Each data signal is sent.

  In the writing operation, the command is received by the communication module 100 of all the recording liquid storage containers, and only the control circuit 135 of the recording liquid storage container whose “color code” matches the code after “WRITE”. Further, by determining that the “WRITE” code is a command accompanied by a unique ID, only the control circuit 135 having the same “unique ID code” continues the subsequent processing. The next “address code” indicates the address of the memory array that is the write destination, and the last “data code” indicates the content to be written.

  Note that the content represented by the “control code” is not limited to the above example, and for example, a control code related to a continuous write command, a verify command, or the like can be added. Further, a code (for example, WRITE-ALL, not shown) that does not accompany the “unique ID code” in the write command, that is, can be written in common to all accessible communication modules may be prepared.

  Example 3 is a read operation from the memory circuit 134. The configuration of the data signal is the same as in the case of the above writing, and only the control circuit 135 of the recording liquid storage container having the same “color code” and “unique ID” performs internal processing according to the “READ” code. That is, the data designated by the address code is read, and the read data is returned.

  In the configuration as described above, a process for detecting the presence or absence of the recording liquid in the recording liquid storage container by a predetermined operation when the printer main body of the present embodiment is in the idling state will be specifically described below.

  FIG. 9 is a side sectional view showing a state in which the recording liquid is consumed from the state of FIG. 3, the amount of the recording liquid is reduced, the sheet member 22 is deformed, and the recording liquid storage unit 15 is crushed. As the recording liquid is consumed, the volume of the recording liquid storage unit 15 gradually decreases, and the sheet member 22 and the communication module 100 approach the bottom surface of the recording liquid storage container 1 and approach the pseudo antenna 217.

  When the antenna 140 and the pseudo antenna 217 in the communication module 100 overlap at a short distance, the mutual inductance between the antennas increases due to electromagnetic interaction. The antenna 140 and the RF circuit of the communication module 100 are designed to resonate at 13.56 MHz. When the mutual inductance increases, the resonance frequency shifts, and a sufficient induced electromotive force cannot be obtained, resulting in a communication error. That is, when the distance between the antenna 140 and the pseudo antenna 217 in the communication module 100 is shortened, the current due to electromagnetic induction by the radio signal of the main body communication unit 304 is reduced, and the power supply circuit 137 cannot supply sufficient power.

  The size and shape of the pseudo antenna 217, the output of a radio signal from the main body communication unit 304, etc. so that a communication error occurs only when the communication module 100 approaches a position corresponding to a predetermined remaining amount of recording liquid. Can be adjusted in advance.

  In FIG. 7, the pseudo antenna 217 is a coil antenna (second coil antenna) like the antenna 140 of the communication module 100. The switch circuit 305 switches between the invalid state and the valid state of the pseudo antenna 217 as a coil by opening and closing ends of the conductive wires constituting the coil of the pseudo antenna 217.

  As consumption of the recording liquid proceeds, the volume of the recording liquid storage chamber filled with the recording liquid decreases, and the movable member moves in a predetermined direction. For example, if the pseudo antenna is arranged in front of the movable member in the moving direction, the communication module moves with the movement of the movable member, and gradually approaches the pseudo antenna.

  When the switch circuit 305 is turned on to place the pseudo antenna 217 in a connected state and wireless communication is performed with the communication module 100 using the communication antenna 215, an induced current also flows through the pseudo antenna 217. When the distance between the communication module 100 and the pseudo antenna 217 is short, the mutual inductance increases and the resonance frequency shifts. Since the communication module performs power extraction optimized for a predetermined frequency, if the resonance frequency shifts, the generated electromotive force decreases and communication becomes impossible.

  FIG. 10 shows a graph obtained by experimentally determining whether or not communication is possible depending on the relative positional relationship between the main body communication antenna 215, the communication module antenna 140, and the pseudo antenna 217. Each of the three types of antennas is a card-type coil antenna having a credit card size. These antennas are arranged in parallel with each other so that the vertical projection planes overlap. The communication method is an electromagnetic induction method of 13.56 MHz, the transmission power is 200 mW, and the normal maximum communication distance is about 6 cm.

  In FIG. 10, for example, the distance between the main body communication antenna 215 and the pseudo antenna 217 is fixed to 3 cm (on a scale of 3 cm on the horizontal axis), and the communication module antenna 140 is gradually moved from the position of the normal maximum communication distance (about 6 cm). Move closer to 215. Because of the action of the pseudo antenna 217, the maximum communication distance is about 5.5 cm. Communication is possible from a communication distance of 5.5 cm to 3.6 cm while receiving the action of the pseudo antenna 217. As described above, in the communication distance range of 3.6 cm to 3 cm (in contact with the pseudo antenna 217), the interaction between the communication module antenna 140 and the pseudo antenna 217 becomes large, and communication becomes impossible.

  Further, the communication module antenna is replaced between the pseudo antenna and the main body communication antenna, and is brought closer to the main body communication antenna from a state where the pseudo antenna is in contact (communication distance 3 cm). When the communication distance is in the range of 3 cm to 2.7 cm, the interaction between antennas is large and communication is impossible as described above. In the communication range of 2.7 cm to 0 cm (in contact with the main body communication antenna), the influence of the pseudo antenna is relatively small and communication is possible.

  A pseudo antenna is installed in advance so that communication is not possible at the position of the communication module when the recording liquid remaining amount is reduced to a predetermined amount. For example, when the movable range of the recording liquid storage unit, that is, the movable range of the communication module is the length indicated by the arrow in FIG. 10, each of the start point and the end point of the movable range are positioned at the arrows. Arrange the antenna. If communication is possible, it is determined that the recording liquid is present because the communication impossible position has not been reached. When a communication error occurs, it can be determined that the remaining amount of the recording liquid is equal to or less than a predetermined amount or that there is no recording liquid. Further, when performing normal communication with the communication module, communication can be performed regardless of the position of the communication module by turning off the switch circuit 395 and disabling the pseudo antenna.

  FIG. 11 is a cross-sectional view for explaining the configuration and processing when detecting the recording liquid consumption process. In FIG. 3A, the carriage is fixed at a first detection position displaced by a predetermined amount D1 from a predetermined wireless communication position. The carriage position can be detected by the encoder scale 209 and the encoder sensor 211 in FIG. In this case, the distance between the communication module, the pseudo antenna, and the main body communication antenna is increased as compared with the predetermined wireless communication position. Therefore, the mutual inductance between the communication module and the pseudo antenna is reduced. However, since the communication module is located in a direction away from the magnetic field region generated by the main body communication antenna, the communication capability is weakened. Therefore, communication is impossible even in a state of low consumption, that is, a state where the distance between the communication module and the pseudo antenna is relatively large and the mutual inductance between the two is small.

  When communication becomes impossible for the first time at the first detection position where the displacement distance from the predetermined wireless communication position is D1, it can be determined that the remaining amount of ink has been consumed to the first amount or less. The determination result is stored in the memory in the communication module and displayed as necessary. At the same time, it may be stored in the main body memory.

  In the consumption detection process after it is determined that the remaining amount of ink has been consumed below the first amount, as shown in FIG. 11B, the carriage position is changed from the predetermined wireless communication position to the predetermined amount D2. It is fixed at the second detection position shifted by (D2 <D1). Similarly, when the second detection position wireless communication whose displacement distance from the predetermined wireless communication position is D2 is disabled for the first time, the remaining amount of ink is consumed to a second amount smaller than the first amount. Can be determined. The same process is repeated n times (for example, 10 stages), and finally the final presence / absence determination of the recording liquid is performed at a predetermined wireless communication position (Dn = 0) shown in FIG.

  In the process of detecting the consumption of the recording liquid, the main body control circuit 300 first sets the carriage to a predetermined position corresponding to the current recording liquid remaining amount in the first recording liquid storage container among the four types of mounted recording liquid storage containers. Move. The switch circuit 305 short-circuits the ends of the conducting wires constituting the coil of the pseudo antenna 217 to switch to an effective state. When the main body communication unit 304 issues a dummy command and receives a normal reply from the communication module 100, the main body communication unit 304 determines that the recording liquid is present in a predetermined amount or more. When a communication error occurs, it is determined that the recording liquid has been consumed until the remaining amount of the recording liquid is equal to or less than a predetermined amount, and the recording liquid consumption information is updated and stored. Next, the carriage is moved to a position corresponding to the current recording liquid remaining amount in the second recording liquid storage container, the same determination is performed, and all colors are processed in the same manner. The switch circuit 305 disables the pseudo antenna 216 and ends the detection process. Since the dummy command is a function that only determines the success or failure of the command communication, it may be anything as long as it is accompanied by predetermined reply data.

  In order to reliably determine whether or not each threshold level has been passed in the process of consuming the recording liquid, determination may be made based on the communication success probability. The main body communication unit 304 issues a predetermined number of dummy commands, sends a predetermined number of radio signals with the same signal strength, and counts the number of successful responses from the communication module 100. When the number of successful responses is greater than a predetermined success number threshold, it is determined that the recording liquid is present in a predetermined amount or more, and when it is less, it is determined that the recording liquid has been consumed up to the predetermined amount. Alternatively, a plurality of wireless signals having the same signal strength are sent, and a ratio between the number of times the wireless signal is transmitted and the number of replies from the communication module 100 is obtained, and the remaining amount reaches a predetermined amount when the ratio is smaller than a predetermined threshold. It is determined that it has been consumed. Employing a recording liquid remaining amount determination method that counts the threshold level passage determination further and determines that the remaining amount of recording liquid has been consumed up to a predetermined amount for the first time when passage determination is made a predetermined number of times. You can also.

  When there is an individual difference in the detection capability of the wireless communication module 100 provided in the recording liquid storage container 1, the detection capability is ranked and the rank information is stored in the storage chip 134 of the wireless communication module 100. The main body control circuit 300 of the printer main body can read the rank information and adjust the output of the radio signal based on the rank information to improve the recording liquid presence / absence detection accuracy.

  In this embodiment, the recording liquid storage container 1 stores predetermined information in a renewable manner by the storage circuit 134, and the printer main body 200 and the like read and write predetermined information from the storage circuit 134 of the recording liquid storage container 1. did. However, the information storage medium of the recording liquid storage container 1 is a ROM (Read Only Memory) in which predetermined information is fixedly stored, and the printer main body 200 and the wireless communication device 215 receive predetermined information from the recording liquid storage container 1. It is also possible to read only.

  Further, in the present embodiment, the recording liquid storage container 1 is exemplified as having a flash memory as an information storage medium. It is also possible to replace this with the following elements. RAM (Random Access Memory) to which a battery is connected. ROM (Read Only Memory). EEPROM (Electrically Erasable Programmable ROM). FeRAM (Ferroelectric RAM).

  Further, in the present embodiment, the recording liquid storage container 1 has a power generation means including the in-module antenna 140, the RF circuit 138, and the power supply circuit 137, and exemplifies a method of generating power by electromagnetic induction. In addition, as described above, a system using electric field energy of microwaves may be used, and a battery may be mounted on the communication module 100.

[Second Embodiment]
In the first embodiment, the positions of the main body communication antenna and the pseudo antenna are fixed, and the communication module antenna is relatively displaced in the horizontal direction as the carriage moves. The relatively displaced antenna may be any of the above three antennas. For example, the main body communication antenna may be fixed at a predetermined position of the main body, and the communication module and the pseudo antenna may be provided on the carriage.

  FIG. 12 is a side cross-sectional view for explaining the recording liquid storage container and the main structure of the main body according to the second embodiment of the present invention. In this embodiment, the pseudo antenna 217 is provided on the outer bottom surface of the recording liquid storage container. The communication module 100 and the pseudo antenna 217 are configured in substantially the same shape, and are arranged so that the projection planes overlap. When the recording liquid storage container 1 is attached to the recording liquid storage container holder 220, a pseudo antenna terminal (not shown) comes into contact with the contact 221 provided on the holder and is connected to the switch circuit 305 in FIG.

  FIG. 13 is a cross-sectional view for explaining the configuration and processing when detecting the recording liquid consumption process. The carriage is fixed at a first detection position that is deviated by a predetermined amount D1 from a predetermined wireless communication position. The carriage position can be detected by the encoder scale 209 and the encoder sensor 211 in FIG. In the case of the present embodiment, the communication module and the pseudo antenna are fixed on the same projection plane, and the main body communication antenna is displaced by D1. In the present embodiment, since the communication module and the pseudo antenna are located in a direction away from the magnetic field region generated by the main body communication antenna, the distance from the main body communication antenna is increased and the communication capability is weakened. Further, it may be considered equivalent to substantially reducing the output intensity of the main body communication antenna. Therefore, communication is impossible even in a state where consumption is low, that is, a state where the mutual inductance between the communication module and the pseudo antenna is small.

  When communication is disabled for the first time at the first detection position, it can be determined that the first amount has been consumed.

  Thereafter, as in the first embodiment, the recording liquid consumption process can be detected stepwise by determining whether communication is possible while shifting the carriage position.

  In the case of the present embodiment, the contact of the pseudo antenna terminal can be detected, so that the mounting of the recording liquid storage container can be reliably detected.

[Third Embodiment]
FIG. 14 is a view showing the appearance of an ink jet printer 600 according to the third embodiment of the present invention, and is a perspective view showing a state in which the main body cover 601 provided at the upper part of the main body is opened and the recording liquid storage container storage chamber is opened. FIG. A recording liquid storage container (701K, 701C, 701M, 701Y) is mounted in the recording liquid storage container storage chamber, and a recording head (not shown) is connected via a recording liquid supply tube or the like (not shown) communicated with the mounting. The recording liquid is supplied to the figure. The printer according to this embodiment has an advantage that the recording liquid storage container is installed on the main body, so that the carriage can be formed small, the main body size can be reduced, and the motor for driving the carriage can be small in driving ability. .

  FIG. 15 is a schematic perspective view showing a recording liquid storage container 701 according to the third embodiment of the present invention. A recording liquid supply port 707 for supplying the recording liquid is provided on the side surface of the recording liquid storage container, and the recording liquid supply port 707 is sealed with a flexible seal member 705. A communication module 100 is provided on the top surface of the sheet member 722 inside the recording liquid storage container.

  FIG. 16 is a side sectional view for explaining a state in which the recording liquid storage container 701 is attached to the main body and the recording liquid storage container storage chamber cover 614 is closed. A needle-like recording liquid introduction member 637 formed on the main body side is inserted into the recording liquid supply port 707 of the recording liquid storage container 701 so that the recording liquid can be supplied. At the same time, communication with the communication module 100 becomes possible by the main body communication antenna 615 formed on the main body side. The pseudo antenna 617 is provided between the main body communication antenna 615 and the communication module 100 and is provided in a main body member constituting the recording liquid storage container storage chamber. As the recording liquid is consumed, the sheet member 722 is gradually crushed downward in the figure. Accordingly, as in the first embodiment, the presence / absence of recording liquid can be detected based on whether communication is possible with the pseudo antenna 617 enabled.

  Further, normal data communication can be performed in a state where the pseudo antenna 617 is disabled.

  In the case of this embodiment, the recording liquid storage container 701 is fixed not at the carriage but at a predetermined position of the main body, so that the main body communication antenna is required for each recording liquid storage container. However, only one main body communication unit is required, and if the main body communication antenna and the pseudo antenna switching means are prepared, individual communication and the presence / absence of the recording liquid can be detected, so the cost does not increase significantly.

  FIG. 17 is a side sectional view for explaining main parts of a recording liquid storage container storage chamber, a carriage, a print medium transport unit, and the like of an ink jet printer according to a fourth embodiment of the present invention. The carriage 605 includes a print head, and printing is performed by scanning in the depth direction of FIG. The printing medium is fed by a paper feed roller 631 and discharged through a platen 632, a paper discharge roller unit 633, a spur 634, and the like. A needle-like recording liquid introduction member 637 formed on the main body side is inserted into the recording liquid supply port 707 of the recording liquid storage container 701 so that the recording liquid can be supplied.

  A recording liquid storage container storage portion is disposed near the top surface in front of the main body, and the recording liquid storage containers are arranged side by side so as to be arranged in the carriage movement direction. A main body communication antenna 615 is provided at a predetermined portion of the carriage 605, and a pseudo antenna 617 is provided at a predetermined interval from the main body communication antenna 615. The main body communication antenna 615 and the pseudo antenna 617 can move within the communication range of the communication module 100 attached to each recording liquid container as the carriage moves. As the recording liquid is consumed, the sheet member 722 is gradually crushed downward in the figure. Accordingly, as in the first embodiment, the presence / absence of recording liquid can be detected based on whether communication is possible with the pseudo antenna 617 enabled.

  Further, normal data communication can be performed in a state where the pseudo antenna 617 is disabled. Further, by detecting whether communication is possible while shifting the carriage 605 by a predetermined amount, it is possible to detect the progress of the recording liquid consumption in the same way as in the first embodiment.

  In the embodiment described in the third embodiment, the recording liquid is supplied from the recording liquid storage container to the recording head on the carriage through the recording liquid supply tube or the like. In such a configuration, a sub-tank that stores a current recording liquid to be supplied to the recording head and constitutes a negative pressure generating mechanism can be provided on the carriage. So far, description has been made mainly on the exchangeable recording liquid storage container. However, any liquid storage container may be used. For example, such a sub tank may be provided with a communication module. The main body communication antenna is used to communicate information such as recording liquid information in the sub tank, and the presence or absence of the recording liquid in the sub tank can be detected by enabling the pseudo antenna member.

  The printer device of the present invention is provided with a main body communication antenna for performing information communication and a pseudo antenna member for detecting the presence or absence of the recording liquid in the recording liquid storage container in a configuration for performing wireless communication with the recording liquid storage container. Accordingly, predetermined information communication can be performed without delay, and the recording liquid presence / absence state of the recording liquid storage container can be easily detected by enabling the pseudo antenna. The recording liquid storage container material may be a material that does not block radio waves, and a special component for the recording liquid storage container is not required for detecting the presence or absence of the recording liquid.

FIG. 2 is a schematic perspective view of a recording liquid storage container according to the first embodiment of the present invention. It is a sectional side view of the recording liquid storage container. FIG. 3 is a side sectional view for explaining a state in which the recording liquid storage container is mounted on a recording head and a holder in the ink jet recording apparatus according to the first embodiment of the present invention. It is a top view of the communication module with which the said recording liquid storage container was equipped. It is a block diagram explaining the function of the said communication module. It is a perspective view which shows the external appearance of the said inkjet recording device. It is a block diagram which shows the control structure of the said inkjet recording device. It is a figure for demonstrating the data structure with respect to the said communication module. FIG. 5 is a side sectional view for explaining a state in which the recording liquid is consumed in a state where the recording liquid storage container is mounted on the recording head and the holder. It is the graph which calculated | required experimentally the possibility of communication by the relative positional relationship of a main body communication antenna, a communication module antenna, and a pseudo antenna. FIG. 5 is a cross-sectional view for explaining a configuration and processing when detecting a recording liquid consumption process according to the first embodiment of the present invention. FIG. 6 is a side sectional view for explaining a state where the recording liquid storage container is mounted on a recording head and a holder in an ink jet recording apparatus according to a second embodiment of the present invention. FIG. 6 is a cross-sectional view for explaining a configuration and processing when detecting a recording liquid consumption process according to a second embodiment of the present invention. It is a perspective view which shows the external appearance of the inkjet recording device which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the external appearance of the recording liquid storage container which concerns on the said 3rd Embodiment. FIG. 9 is a side sectional view of a recording apparatus equipped with a recording liquid storage container in a third embodiment. FIG. 10 is a side sectional view for explaining a state in which a recording liquid storage container is mounted on a recording apparatus main body in an ink jet recording apparatus according to a fourth embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording liquid storage container 1K Recording liquid storage container 1C Recording liquid storage container 1M Recording liquid storage container 1Y Recording liquid storage container 2 Frame 3 Latch lever 5 1st engaging part 6 2nd engaging part 7 Recording liquid supply port 10 Cover member DESCRIPTION OF SYMBOLS 11 Air introduction hole 15 Recording liquid storage part 20 Spring member 21 Pressure plate 22 Sheet member 100 Communication module 101 Base sheet 130 Circuit chip 140 Antenna 134 Storage circuit 135 Control circuit 137 Power supply circuit 138 RF circuit 200 Inkjet printer 201 Main body cover 202 Automatic supply Paper device 203 Paper discharge tray 205 Carriage 206 Flexible cable 207 Guide shaft 209 Encoder scale 211 Encoder sensor 213 Operation panel 215 Communication antenna 217 Pseudo antenna 220 Holder 221 Contact 256 Second Stop portion 300 main body control board 301 CPU
302 RAM
303 ROM
304 Wireless communication unit 305 Switch circuit 405 Recording head unit 455 First locking portion 600 Inkjet printer 601 Main body cover 602 Automatic paper feeder 603 Paper discharge tray 605 Carriage 613 Operation panel 614 Recording liquid storage container storage chamber cover 615 Communication antenna 617 Pseudo Antenna 618 Antenna support member 637 Recording liquid introduction member 631 Paper feed roller 632 Platen 633 Paper discharge roller unit 634 Spur 705 Seal member 707 Recording liquid supply port 701 Recording liquid storage container 701K Recording liquid storage container 701C Recording liquid storage container 701M Recording liquid storage Container 701Y Recording liquid storage container

Claims (30)

A recording liquid storage container that is detachably attached to a recording apparatus that performs recording on a recording medium, and stores a recording liquid supplied to the recording apparatus;
A communication means provided in the recording liquid storage container, the position of which varies depending on the amount of the recording liquid stored in the recording liquid storage container;
A communication antenna for performing wireless communication with the communication means;
A pseudo antenna that interacts electromagnetically with the communication means and affects the success or failure of communication of the communication means according to the position of the communication means;
Control means for determining the amount of recording liquid stored in the recording liquid storage container from success or failure of communication of the communication means;
A recording apparatus.   The recording apparatus according to claim 1, wherein at least a part of the recording liquid storage container is formed of a flexible sheet member, and the communication unit is attached to the sheet member that is deformed by a decrease in recording liquid.   2. The recording according to claim 1, wherein the communication means includes a first coil antenna and is operated by electric power obtained from a current generated in the first coil antenna by electromagnetic induction of a radio signal transmitted from the communication antenna. apparatus.   The pseudo antenna includes a second coil antenna, and when a distance from the first coil antenna is shortened due to a decrease in recording liquid, a current due to electromagnetic induction generated in the first antenna by the radio signal is reduced. Item 4. The recording device according to Item 3.   Switching to switch the pseudo antenna between an effective state interacting with the first coil antenna and an invalid state not interacting with each other by opening and closing ends of the conducting wires constituting the second coil antenna. The recording apparatus according to claim 4, further comprising: means.   6. The control unit according to claim 1, wherein the control unit sends a radio signal from the communication antenna, and determines the remaining amount of the recording liquid in the recording liquid storage container according to whether or not the communication unit responds to the radio signal. The recording apparatus according to any one of the above.   The control means sends a wireless signal a plurality of times from the communication antenna, and the recording liquid is predetermined when the ratio of the number of replies from the communication means to the number of transmissions of the wireless signal is smaller than a predetermined threshold. The recording apparatus according to claim 1, wherein the recording apparatus determines that the amount is equal to or less than a predetermined amount.   The control means sends a wireless signal a plurality of times from the communication antenna, and the recording liquid is predetermined when the ratio of the number of consecutive replies from the communication means to the wireless signal is smaller than a predetermined threshold value. The recording apparatus according to claim 1, wherein the recording apparatus is determined to be equal to or less than an amount.   The recording apparatus according to claim 1, further comprising a unit that adjusts an output of a radio signal transmitted from the communication antenna toward the communication unit.   At least one of the first coil antenna, the pseudo antenna, and the communication antenna includes a moving means that can move relatively apart from the displacement due to the decrease in the recording liquid, and further the movement The recording apparatus according to claim 1, further comprising means for detecting a displacement distance relatively displaced by the means.   The recording apparatus according to claim 10, wherein the control unit determines the amount of the recording liquid stored in the recording liquid storage container from the success or failure of the communication of the communication unit and the displacement distance of the moved antenna.   The recording apparatus according to claim 1, wherein the pseudo antenna has substantially the same size and shape as an antenna included in the communication unit. A communication antenna that receives recording liquid from a detachably mounted recording liquid storage container, records on a recording medium, and performs wireless communication with communication means provided in the mounted recording liquid storage container; and the communication means A pseudo antenna that interacts electromagnetically with the communication means to influence the success or failure of communication of the communication means according to the position of the communication means, and the recording stored in the recording liquid storage container from the success or failure of communication of the communication means A recording liquid storage container mounted on a recording apparatus having a control means for determining the amount of liquid,
A recording liquid provided in the recording liquid storage container, the position of which varies depending on the amount of the recording liquid stored in the recording liquid storage container, and the communication means having a storage means therein. Storage container.   14. The recording liquid storage container according to claim 13, wherein at least a part of the recording liquid storage container is formed of a flexible sheet member, and the communication unit is attached to the sheet member that is deformed by a decrease in the recording liquid. .   The said communication means contains a 1st coil antenna, It operates with the electric power obtained from the electric current which generate | occur | produces in the said 1st coil antenna by the electromagnetic induction of the radio signal sent from the said communication antenna. Recording liquid storage container.   The first coil antenna is configured to approach the pseudo antenna due to a decrease in recording liquid. When the distance from the pseudo antenna decreases, the first coil antenna is moved to the first antenna by the second coil antenna included in the pseudo antenna. The recording liquid storage container according to claim 15, wherein a current generated by electromagnetic induction is reduced.   The pseudo antenna is provided on an outer surface of the recording liquid storage container, is a terminal of a conductive wire constituting the pseudo antenna, and the pseudo antenna is in an effective state in which the pseudo antenna interacts with the first coil antenna. A terminal for connecting to the wiring of the switching means for switching to the invalid state, and the first coil antenna is configured to approach the pseudo antenna due to a decrease in recording liquid, and the distance from the pseudo antenna is 16. The recording liquid storage container according to claim 15, wherein when the length is shortened, a current due to electromagnetic induction generated in the first antenna is reduced by the second coil antenna included in the pseudo antenna. In a recording apparatus capable of mounting a recording liquid storage container having a communication means whose position changes according to the amount of recording liquid to be stored and performing recording on a recording medium with the recording liquid supplied from the recording liquid storage container.
A communication antenna for performing wireless communication with the communication means;
It interacts electromagnetically with the communication means whose position has changed due to a decrease in the recording liquid stored in the recording liquid storage container, and affects the success or failure of communication of the communication means according to the position of the communication means. A pseudo antenna to give,
Control means for determining the amount of recording liquid stored in the recording liquid storage container from success or failure of communication of the communication means;
A recording apparatus.   The recording apparatus according to claim 17, wherein the pseudo antenna is disposed at a position where the distance from the communication unit becomes shorter as the recording liquid stored in the recording liquid storage container attached to the recording apparatus decreases.   The communication means includes a first coil antenna, the pseudo antenna includes a second coil antenna, and operates the communication means when a distance between the communication means and the pseudo antenna becomes short due to a decrease in recording liquid. 20. The recording apparatus according to claim 18, wherein a current due to electromagnetic induction generated in the first coil antenna by the wireless communication for generating the electric power is reduced.   Switching means for switching the pseudo antenna between an effective state interacting with the first coil antenna and an invalid state not interacting with each other by opening and closing ends of the conductors constituting the second coil antenna. The recording apparatus according to claim 20, further comprising:   22. The control unit according to claim 18, wherein the control unit sends a radio signal from the communication antenna, and determines the remaining amount of the recording liquid in the recording liquid storage container according to whether or not the communication unit responds to the radio signal. The recording apparatus according to any one of the above.   The control means sends a wireless signal a plurality of times from the communication antenna, and the recording liquid is predetermined when the ratio of the number of replies from the communication means to the number of transmissions of the wireless signal is smaller than a predetermined threshold. The recording apparatus according to claim 17, wherein the recording apparatus determines that the amount is equal to or less than a predetermined amount.   The control means sends a wireless signal a plurality of times from the communication antenna, and the recording liquid is predetermined when the ratio of the number of consecutive replies from the communication means to the wireless signal is smaller than a predetermined threshold value. The recording apparatus according to claim 18, wherein the recording apparatus is determined to be equal to or less than an amount. A recording liquid storage container having communication means whose position changes according to the amount of recording liquid to be stored, a communication antenna that performs wireless communication with the communication means, and a recording liquid stored in the recording liquid storage container when switched effectively. Preparing a pseudo antenna that interacts electromagnetically with the communication means whose position has been changed by decreasing, and affects the success or failure of communication of the communication means according to the position of the communication means,
The pseudo antenna is effectively switched by the switching means,
A transmission step of sending a radio signal from a position sandwiching the recording liquid storage unit toward the communication means provided in the recording liquid storage unit of the recording liquid storage container attached to the recording apparatus;
A receiving step for determining whether or not there is a reply from the communication means for the wireless signal;
In accordance with the determination, a determination step of determining a remaining amount of the recording liquid inside the recording liquid storage unit;
A method for determining the remaining amount of recording liquid. A recording liquid container having a coil antenna and having a communication means whose position changes according to the amount of recording liquid to be stored, a communication antenna for performing wireless communication with the communication means, and a recording stored in the recording liquid container A pseudo antenna that interacts electromagnetically with the communication means whose position has changed due to a decrease in liquid, and affects the success or failure of communication of the communication means according to the position of the communication means, the coil antenna, Among the pseudo antenna and the communication antenna, apart from the displacement due to the decrease in the recording liquid, at least one antenna is moved relative to the communication means, and is relatively displaced by the moving means. A means for detecting a displacement distance and a storage means for storing the remaining amount of the recording liquid are prepared,
A reading step of reading the remaining amount of the recording liquid from the storage means;
A moving step of moving the one antenna to a position corresponding to the remaining amount of the recording liquid read from the storage means;
A transmission step of sending a radio signal from the communication antenna at a position sandwiching the recording liquid storage unit toward the communication means provided in the recording liquid storage unit of the recording liquid storage container attached to the recording apparatus;
A receiving step for determining the position of the one antenna and the presence or absence of a reply from the communication means for the wireless signal;
A determination step of determining a remaining amount of the recording liquid in the recording liquid storage unit according to the position of the one antenna and the determination;
Storing the remaining amount of the recording liquid determined in the determination step in the storage means;
A method for determining the remaining amount of recording liquid. A recording liquid container having a coil antenna and having a communication means whose position changes according to the amount of recording liquid to be stored, a communication antenna for performing wireless communication with the communication means, and a recording stored in the recording liquid container A pseudo antenna that interacts electromagnetically with the communication means whose position has changed due to a decrease in liquid, and affects the success or failure of communication of the communication means according to the position of the communication means, the coil antenna, Among the pseudo antenna and the communication antenna, apart from the displacement due to the decrease in the recording liquid, at least one antenna is moved relative to the communication means, and is relatively displaced by the moving means. A means for detecting a displacement distance and a storage means for storing the remaining amount of the recording liquid are prepared,
A moving step of moving the one antenna;
A transmission step of sending a radio signal from the communication antenna at a position sandwiching the recording liquid storage unit toward the communication means provided in the recording liquid storage unit of the recording liquid storage container attached to the recording apparatus;
A receiving step for determining the position of the one antenna and the presence or absence of a reply from the communication means for the wireless signal;
A determination step of determining a remaining amount of the recording liquid in the recording liquid storage unit according to the position of the one antenna and the determination;
Storing the remaining amount of the recording liquid determined in the determination step in the storage means;
A method for determining the remaining amount of recording liquid.   In the movement step, the one antenna is moved to a first predetermined position, and after the transmission step, the reception step, and the determination step are executed, the one antenna is changed according to a determination result of the determination step. 28. The recording liquid remaining amount determining method according to claim 27, wherein the transmitting step, the receiving step, and the determining step are performed again by displacing the antenna to a second position different from the first predetermined position. The transmitting step includes transmitting a radio signal having the same signal strength a plurality of times,
The receiving step includes determining a ratio of the number of times of reply to the number of transmissions of the wireless signal;
The determining step includes determining that the recording liquid is equal to or less than a predetermined amount when the ratio is smaller than a predetermined threshold.
29. A recording liquid remaining amount determining method according to claim 25. The transmitting step includes transmitting a radio signal having the same signal strength a plurality of times,
The receiving step includes obtaining the number of times the wireless signal has been continuously replied to,
The determination step includes determining that the recording liquid is equal to or less than a predetermined amount when the number of times is less than a predetermined threshold value.
29. A recording liquid remaining amount determining method according to claim 25.

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