JPH07266577A - Recording device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] Even if the ink supply unit is detached or replaced when the power of the apparatus main body is not turned on, proper recording control and operation can always be performed. A short-circuit terminal 203 for short-circuiting a replaceable ink cartridge 202 mounted on a printer body 201.
Is provided so that the CPU 204 can detect the mounting of the cartridge 202. A battery 218 for supplying electric power is provided to the memories 211 to 213 for storing the individual information of the cartridge 202 so that the stored contents of the memories 211 to 213 are electrically held when the printer main body 201 is not turned on and the power is not turned on. When the cartridge 202 is detached at some time, the transistor 217 is turned off to change the contents stored in the memories 211 to 213. When the power is turned on again, the CPU 204 recognizes the removal or replacement of the ink cartridge 202 based on the change in the stored contents of the memories 211 to 213, and appropriately controls the recording operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus having exchangeable ink supply means for supplying recording ink to a recording section.

[0002]

2. Description of the Related Art Conventionally, information devices such as printers and word processors using an exchangeable ink cartridge (ink supply means) for supplying recording ink to a recording portion have been put into practical use. Such a recording device records an image on a recording sheet by driving a recording head based on input image information and the like. However, among these devices, the remaining amount of ink is small. In some cases, recording may not be performed normally, and in some cases, recording control needs to be changed according to the characteristics of the ink cartridge and the remaining ink amount. In addition, there is a case where all the image information cannot be recorded because the ink suddenly runs out.

Further, in the recording device as described above,
In order to obtain a high-quality recording result intended by the user, there is a method in which recording control is performed based on information about the cartridge such as characteristics of each ink cartridge, remaining amount of ink, and cartridge usage period. Further, among the recording devices, there is one in which the information of the mounted ink cartridge is stored and managed on the device main body side.

[0004]

However, in the conventional recording apparatus as described above, since the information of the ink cartridge differs depending on the characteristics and usage condition of each cartridge, the mounted ink cartridge is replaced. In that case, the information of the ink cartridge recorded up to that point becomes invalid. Therefore, even if the ink cartridge is replaced, it is difficult to obtain a high-quality recording result when the recording control based on the unique information of the ink cartridge before the replacement is performed, and therefore, the ink cartridge on the apparatus main body side is difficult to obtain. Is detected, and if the exchange is detected, it is necessary to invalidate the record information before the detection. At this time, if the ink cartridge is replaced while the power of the main body of the device is turned on, the replacement operation can be detected by the main body of the device, but the replacement operation cannot be detected when the power is not turned on. However, there is a problem that the unique information of the ink cartridge before replacement cannot be invalidated.

The present invention has been made to solve the above-mentioned problems, and even if the ink supply means is replaced when the power of the apparatus main body is not turned on, it can be detected when the power is turned on again, and it is always appropriate. The purpose of the present invention is to obtain a recording device capable of various recording controls and operations.

[0006]

The recording apparatus of the present invention is configured as follows.

(1) A memory having exchangeable ink supply means for supplying the recording ink to the recording section, storing the information of the attached ink supply means, and the stored content of the memory when it disappears Detecting means for detecting the above, a power supply for supplying power to the memory when the power supply of the apparatus main body is not turned on, and a changing means for changing the stored contents of the memory when the ink supply means is detached when the power supply of the apparatus main body is not turned on With and
When the power of the apparatus main body is turned on again, the detachment of the ink supply means is detected from the output of the detection means.

(2) In the recording apparatus of (1) above, the changing means has a switch means for switching the power supply to the memory in accordance with the attachment / detachment state of the ink supply means, and when the ink supply means is detached. The power supply to the memory was stopped.

(3) In the recording apparatus of (1) above, the changing means has a power supply path for supplying power from the power supply to the memory via the ink supply means, and when the ink supply means is detached, the memory is changed. The power supply to is stopped.

(4) In the recording apparatus of (1) above, a power supply for supplying power to the memory is provided on the ink supply means side,
The changing means has a power supply path from the ink supply means to the memory, and when the ink supply means is detached, the power supply to the memory is stopped.

(5) In the recording apparatus of (1) above, the changing means stores the uncertain data in the memory when the ink supply means is detached.

[0012]

In the recording apparatus of the present invention, when the ink supply means is detached when the main body of the apparatus is not powered on, the contents of the memory storing the information of the ink supply means are changed,
When the power is turned on again, the replacement of the ink supply means is detected.

Further, when the ink supply means is detached, the power supply to the memory is stopped and the contents stored in the memory are changed.

[0014]

FIG. 1 is a perspective view showing the outer shape of a printer having a replaceable ink cartridge according to the present invention. In the figure, reference numeral 1 denotes a carriage to which a replaceable ink cartridge 2 is attachable / detachable, and is movable along the guides 3 and 4 in the arrow a direction. The carriage 1 is locked by a scanning belt 7 stretched around shafts 5 and 6, and is driven by a scanning motor 8. Reference numeral 9 is a paper feed motor for automatically feeding the recording paper 10, and 11 is a platen knob.

[First Embodiment] FIG. 2 is a block diagram showing a first embodiment of the present invention having the above-mentioned configuration. In the figure, 201 is a printer main body (apparatus main body), 202 is a recording head as recording means, and a replaceable ink cartridge (ink supply means) for supplying recording ink to the recording part. The built-in system is configured to store and manage the unique information of the ink cartridge 202 that has been created regardless of the power-on state.

Reference numeral 203 denotes a short terminal provided on the cartridge 202. When the cartridge 202 is installed in the printer, the cartridge installation detection terminals 219 and 22 provided at the cartridge installation position of the printer body 201.
By shorting 0, the main body 201 can recognize the presence of the cartridge 202. A CPU 204 controls the printer, and has a counter 221. Reference numeral 205 is a ROM for storing a printer control program, 206 is a RAM used as a work area and a print data buffer, and 207 is an input / output port (I / O port) that outputs printer control signals and captures the states of various sensors. ).

Reference numeral 208 is a printing mechanism section, and 209 is a CPU 20.
A driver unit 21 that is controlled by a control signal from the control unit 4 and drives each actuator in the printing mechanism unit 208.
0 is CPU 204, ROM 205, RAM 206, I / O
Connection is performed by transmitting and receiving data between the O port 207 and a memory for storing ink cartridge information described later 16
It is a bit system bus.

Numerals 221 to 213 are memories for storing the above-mentioned data (cartridge information) about the ink cartridge 202, and are composed of three 8-bit latches writable by the "H" level (high level) input. .
The data input terminal of the memory 211 is connected to the head rank detection terminal 214 of the cartridge 202, and the output terminal of the memory 211 is connected to the system bus 210 via the output buffer 215.
Are connected to the lower 8 bits of. Memory 212, 21
The input and output terminals of No. 3 are connected to the system bus 210 via the input / output buffer 216. The writing clocks for these memories 211, 212, and 213 are output from the CPU 204, respectively. Further, these memories 211 to 213 are supplied with electric power from a lithium battery 218 which is a built-in power source and stored when the power source of the printer main body 201 is not turned on and a switch transistor 217 for backup described later is in an ON state. The contents are held electronically. The backup switch transistor 217 includes the memories 211 to 211.
It serves as a switch means for supplying electric power from the lithium battery 218 to 213.

Reference numerals 219 and 220 denote cartridge mounting detection terminals, the terminal 219 is connected to the power supply lines of the memories 211 to 213, and the terminal 220 is the transistor 21.
7 and CART signal output lines are connected to the CPU 204. Then, when the cartridge is installed, these two terminals 21 are contacted by contact with the short terminals 203.
9, 220 are short-circuited, and the CART signal becomes "H" level. Conversely, when the cartridge is detached, the terminals 219 and 220 are in the open state, and the CA
An "L" level (low level) output appears in the RT signal. Further, the terminal 220 is further connected to the base of the backup switch transistor 217, so that the base current of the transistor 217 does not flow in the cartridge detached state, and power is not supplied to the memories 211 to 213.

FIG. 3 shows the cartridge 202 and the memory 2.
FIG. 3 is a configuration diagram showing the details of the periphery of 11 to 213, showing how the memories 211 to 213 are connected to their power supplies and the system bus, and the connection between the cartridge 202 and the memory 211.

The control features of the printing of this printer will be described.

Cartridge 202 used in this embodiment
Can be roughly classified into a cartridge 202 with a head having four types of head characteristics, because the resistance value of the heating element on the head varies from head to head due to manufacturing reasons. On the other hand, in this printer, in order to perform high-quality recording, when the cartridge 202 is replaced, the head rank, which is the head characteristic of each cartridge with a head, is read and stored in the lower 4 bits of the memory 211. Incidentally, at the time of recording, the CPU 204 controls the application of one of the four different applied voltages corresponding to the read head rank. The head rank is detected by reading the disconnection state of the head rank detecting diode 222 on each cartridge as shown in FIG.

Further, in order to prevent incomplete recording due to a shortage of ink, the ink cartridge 202 currently installed is installed.
CPU stores the number of character lines recorded in
The counter 221 of 204 counts each line and stores it in the lower 15 bits of the memories 212 and 213 at the end of recording. Then, when the recording operation is performed next time, the memory 21 is again used.
2, 213 reads data from the counter 221 and monitors this data to obtain a predetermined number of recording lines A.
When it exceeds the limit, it is determined that the ink amount in the cartridge 202 is small, and a warning is issued to the user by blinking the LED or the like. Further, when a further recording operation is performed without replacing the ink cartridge 202 and the value of the counter 221 exceeds the predetermined number of recording lines B, a new recording operation is performed unless the ink cartridge 202 is replaced. There is no control.

The upper 1 bit 8 of the memory 211
D and the upper 1 bit 8D of the memory 213 are used as a parity check bit for confirming the accuracy of the data, and are used here for detecting the destruction (loss) of the memory contents due to the ink cartridge exchange. There is.

Further, the CPU 204 constitutes a detecting means for detecting the disappearance of the stored contents of the memories 211 to 213 together with the above parity check bit, and further the terminals 219 and 220 together with the ink cartridge 2.
No. 02, which detects the mounting state of the printer, and a transistor 217 that switches in accordance with the detection result of this detection unit, and memory 211 to 211 when the ink cartridge 202 is detached when the printer main body 201 is not powered on. A changing unit that changes the stored contents of the memory 213 is configured. When the power of the printer main body 201 is turned on again, it is possible to detect the detachment of the ink cartridge 202 from the output of the detection means, and when the ink cartridge 202 is detached, the memories 211 to 213.
It is designed to stop the power supply to.

Next, the operation of this embodiment in the printer having the above configuration will be described.

First, when a new ink cartridge 202 with a head is attached and the printer is performing a recording operation without replacing the cartridge, the CPU 2
Reference numeral 04 performs a predetermined control process for the printing mechanism unit 208, and at the same time, the counter 221 for counting the number of recording lines is counted up every time the recording operation for one line is completed. When the recording operation is completed and the recording operation restart command is not issued for the predetermined time, the CPU 204 stores the contents of the counter 221 in the memory 21.
Write to 2, 213. Thereafter, when the recording operation is performed again, the recording row number data is read again by the memories 212 and 213.

When the value of the counter 221 exceeds the predetermined recording line numerical value A during the above-described recording operation, the warning generation process for notifying the user of the ink shortage is executed according to the above control. Similarly, when the value of the counter 221 exceeds the predetermined recording line numerical value B, a new recording operation is prohibited according to the above control, and a control process for urging the ink cartridge 202 to be replaced is executed.

As will be described later in detail, the head rank of the cartridge is stored in the memory 211 in the initial setting process when the power is first turned on after the cartridge is replaced. Then, the ink cartridge 202 is subjected to the initial setting operation immediately after the power is turned on.
The CPU 204 reads out the head rank data from the memory 211, and sets the head applied voltage at the time of recording according to the head rank.

Even when the power of the printer is not turned on, as long as the cartridge 202 is mounted in the printer body 201, the cartridge mounting detection terminals 219 and 220 are short-circuited by the shorting terminal 203. 217 is supplied with the base current and is turned on, and the backup lithium battery 21
8, the power continues to be supplied to the memories 211 to 213.
Therefore, the head rank data and the recording row number data stored in the memories 211 to 213 are electrically held.

Next, the case where the ink cartridge is replaced will be described.

When the cartridge is replaced while the power is on, the terminal 21 is released when the cartridge is removed.
Since 9 and 220 are in the open state, the CART signal changes from "H" level to "L" level. Then, when the cartridge is mounted again, the CART signal returns to the "H" level. The CPU 204 detects this level change, recognizes that the cartridge has been detached, determines that the cartridge has been replaced with a new cartridge, and executes a cartridge replacement process consisting of the following two operations.

That is, after confirming the mounting of the cartridge 202, the CPU 204 first sets the HRNK signal shown in FIG.
The head rank of is stored in the memory 211. Then, a "0" signal is input to the memories 212 and 213 to clear the record row number data. After that, the CPU 204 restarts the memory 21.
The contents of 1 to 213 are read. As a result, the control by the new ink cartridge 202 is normally performed.

When the ink cartridge 202 is detached when the printer is not powered on, the CP
Since the U204 has stopped its operation, its leaving operation cannot be detected. Therefore, in this printer, when the printer body 201 is powered on, the CPU 204
Initial setting processing is performed according to the contents of the control program stored in the OM 205. This processing includes detection of mounting of the ink cartridge 202, determination of presence / absence of ink cartridge replacement operation, and operation of reading print line number data when the cartridge is not replaced. Also, the cartridge 2
If it is found that 02 has been replaced, the same cartridge replacement process as when the power is turned on is executed.

Further, when detecting the mounting of the cartridge 202, the CPU 204 reads the input level of the CART signal, and when it is at the "H" level, it indicates that the cartridge 202 is mounted at the "L" level. In some cases, it is detected that the cartridge 202 is not installed. Then, when the cartridge not-mounted state is detected, a predetermined warning process is executed to the user, and when it is confirmed that the cartridge 202 is mounted, the cartridge is replaced when the power is not turned on. Whether or not it is determined is performed.

In the above determination process, the CPU 204 reads out 8 bits of the memory 211 and 16 bits of the memories 212 and 213, performs an odd parity check on each data, and replaces the cartridge when a parity error occurs. It is executed by judging that it has been done.

That is, the normal CPU 204 makes the memory 21
When 7 bits of the head rank data of 1 are read and the data of the number of 15-bit recording rows of the memories 212 and 213 is updated, the parity bit is set to “0” so that the number of “1” in each memory becomes an odd number. Alternatively, if the ink cartridge 202 is detached when the power is not turned on by performing the process of storing “1”, the power supply to the memories 211 to 213 is temporarily stopped as described above. , The contents of the memories 211 to 213 are destroyed, and the parity check fails. Of course, no parity error should occur if no departure has occurred.

When the cartridge exchange is detected by the above process when the power is not turned on, the CPU 204 executes the same cartridge exchange process as when the power is turned on. That is, the CPU 204 inputs the clock pulse of "L" to the memory 211 and stores the head rank data of the cartridge. Next, by inputting a "0" signal to the memories 212 and 213, the recording row number data is cleared. Then CP
U204 again reads the contents of the memories 211 to 213. As a result, the recording control by the new ink cartridge is normally performed. If it is determined that the cartridge has not been replaced, the memories 211 to 2
Recording control is performed on the basis of the head rank data and the recording row number data read from 13.

FIG. 4 is a flow chart showing the procedure of the initial setting process for the ink cartridge 202 when the power is turned on.

First, when the printer body 201 is powered on (step S1), the CPU 204 causes the CART shown in FIG.
The level of the signal is confirmed (step S2), and if "H", the data in the memory 211 is read (step S2).
3) If it is "L", a warning that the ink cartridge 202 is not mounted is issued (step S4). Then, after reading the data of the memory 211, the above-mentioned odd parity check is executed on the data of the memory 211 (step S5).
The contents of Nos. 2 and 213 are read (step S6), and if they are unacceptable (parity error), it is determined that the ink cartridge has been replaced when the power is not turned on (step S7).

In steps S6, the memories 212 and 213 are
CPU 204 reads the contents of
The same odd parity check as described above is executed for Nos. 2 and 213 (step S8). And pass (OK)
If so, it is determined that the ink cartridge has not been replaced when the power is not turned on (step S9), and recording control is performed based on the read data (step S10).
If it fails (parity error), it is determined that the ink cartridge has been replaced when the power was not turned on (step S11).

Further, the above steps S7 and S1
When it is determined that the ink cartridge has been exchanged when the power is not turned on in step 1, the pulse output of "H" is output as the HRNK signal, and the head rank of the new cartridge is read into the memory 211 (step S12). Then C
The PU 204 reads the contents of the memory 211 and adds an odd parity bit (step S13),
The parity bit is written in the memory 211 (step S14).

Next, the CPU 204 uses the memories 212 and 21.
The data of No. 3 is cleared and the above-mentioned odd parity bit is written (step S15). Then, the contents of the memory 211 are read (step S16), and the memory 21
The contents of 2 and 213 are also read (step S17), and the process proceeds to step S10.

As described above, according to this embodiment, not only when the power is turned on in the printer, but also when the ink cartridge with the print head is replaced when the power is not turned on, it can be detected when the power is turned on again. Therefore, it is possible to invalidate the data relating to the cartridge mounted before the replacement, especially the data that changes depending on the usage condition. Therefore, a proper recording operation can always be performed.

[Second Embodiment] FIG. 5 is a block diagram showing the configuration of the second embodiment of the present invention, and the same reference numerals as those in FIG. 2 denote the same components.

In the first embodiment described above, in order to control the electric retention of the stored contents depending on the presence or absence of power supply to the memories 211 to 213 when the printer is not powered on, the power to the memories 211 to 213 is controlled. A lithium battery 218 is provided on the printer body 201 side as a supply means, and control is performed by turning on and off the switch transistor 217 for backup according to the attachment / detachment state of the ink cartridge. In the present embodiment, as shown in FIG. The battery 21
8 to the memories 211 to 213 via the cartridge 202 side. The power supply path 501 and the CPU 204 cause the memories 211 to 211 when the ink cartridge 202 is detached when the power is not turned on.
A changing unit that changes the stored contents of the memory 213 is configured.
Then, when the ink cartridge 202 is detached when the power is not turned on, the power supply to the memories 211 to 213 is stopped.

Even in the printer having such a structure, if the cartridge 202 is detached when the power is not turned on, the power supply path to the memories 211 to 213 is cut off.
The data latch contents are destroyed. Therefore, the same effect as that of the embodiment of FIG. 2 can be obtained, and the mounting detecting means of the cartridge 202 and the switch transistor 217 for backup are unnecessary in this embodiment.

[Third Embodiment] FIG. 6 is a block diagram showing the structure of a third embodiment of the present invention. The same reference numerals as those in FIGS. 2 and 5 denote the same constituent parts.

In the first and second embodiments, a lithium battery 218, which is a means for supplying electric power to the memories 211 to 213 when the power of the printer is not turned on, is provided on the printer main body 201 side, depending on the mounting / dismounting state of the cartridge 202. The electrical holding of the memory contents is controlled by turning on and off the backup switch transistor 217.
In the present embodiment, as shown in FIG. 6, a battery 218 is provided on the cartridge 202 side, and a power supply path 601 from this cartridge 202 to the memories 211 to 213 and a CP.
U204 constitutes the above-mentioned changing means.

Even in such a configuration, if the cartridge 202 is removed while the printer main body 201 is not powered on, the power supply means of the memories 211 to 213 is lost, and the contents of the data latch are similarly destroyed. Therefore, it is possible to obtain the same effect as each of the above-described embodiments, and it is not necessary to add terminals and complicated wiring accompanying the cartridge of the power supply path as in the embodiment of FIG. The mounting detecting means and the switch transistor 217 for backup are also unnecessary.

[Fourth Embodiment] FIG. 7 is a block diagram showing a fourth embodiment of the present invention. As in FIG. 3, memories 211 to 213 of the printer, their power supplies, a system bus, a cartridge 202 and a memory. The area around 211 is shown. The components not shown in the figure are the same as those in the printer of the embodiment shown in FIG. 2, and therefore their details are omitted here.

In this embodiment, by the above-mentioned changing means constituted by the CPU 204, the uncertain data is stored in the memories 211 to 213 when the ink cartridge 202 is detached when the power is not turned on. As shown in (1), a one-circuit / two-contact type switch 701 whose contacts are switched according to the mounted state of the cartridge is provided. The common terminal of the switch 701 is connected to the write signal (HRNK signal) line of the memory 211, and of the two connection terminals, the terminal A is connected to the pull-up resistor 702 and the terminal B is connected to the pull-down resistor 703.

In such a structure, the common terminal of the switch 701 is connected to the terminal A when the ink cartridge 202 is completely removed from the printer, and the head rank detection terminal 214 is connected to the cartridge 20 when the ink cartridge 202 is mounted.
The structure is such that the common terminal is connected to the terminal B before contacting the second head rank detection diode 222. The memories 211 to 213 are constantly supplied with power, and the transistor 217 that controls the power supply from the power supply according to the cartridge mounting state when the power is not supplied.
Does not exist. Further, the pull-up resistor 702 is connected to the backup battery 218 like the memory.

When the ink cartridge 202 is mounted in the printer having the above-mentioned structure, the switch 701 is used.
Of the pull-down resistor 70. Therefore, the HRNK signal from the CPU 204 is connected to the common terminal of the pull-down resistor 70.
3 is connected to the write signal input terminal of the memory 211. The memory 211 is a latch that takes in data from the data input terminal when the write signal is at "H" level. When the power is turned on, the CPU 204 outputs "H" level to the HRNK signal line under the same control as in the embodiment of FIG. The head rank information of the head rank detecting diode 222 is stored in the memory 211. It should be noted that when the reading is not performed and the power is not turned on, that is, as long as the ink cartridge 202 is attached to the printer while the CPU 204 is stopped,
The K signal is kept at "L" level.

Further, at the moment when the ink cartridge 202 is removed when the power is not turned on, the common terminal and the terminal A are connected in the switch 701, so that the HRNK signal line from the CPU 204 is connected to the memory 211 via the pull-up resistor 702. It is connected to the write signal input terminal. Then, the HRNK signal line kept at the “L” level becomes a state in which the pull-up resistor is connected due to the change of the state of the switch 701, and becomes the “H” level state. This HRNK
The head rank information of the head rank detection diode 222 is stored in the memory 211 by the change of the signal line to the “H” level, but since the cartridge 202 is in the detached state, the head rank detection terminal 214 is not connected. Nothing is connected and uncertain data is stored in the memory 211.

When the power is turned on again, the printer initialization process similar to that of the embodiment shown in FIG. 2 causes a parity error with respect to the undefined data stored in the memory 211. As in the example, the printer can recognize that the ink cartridge 202 has been replaced when the power is not turned on. Therefore, a proper recording operation can always be performed.

[0057]

As described above, according to the present invention,
If the replaceable ink supply means is detached from the main body of the apparatus when the power is not turned on, it can be detected when the power is turned on again, and the individual information held regarding the ink supply means before the detachment is invalidated. Even if the ink supply means is replaced with a new one when the power is not turned on, this can be recognized, and normal recording control is always performed.
This has the effect of enabling movement.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer shape of a printer according to the present invention.

FIG. 2 is a block diagram showing the configuration of the first embodiment.

FIG. 3 is a configuration diagram showing details of the periphery of a cartridge and a memory in the first embodiment.

FIG. 4 is a flowchart showing a processing procedure when the power is turned on in the first embodiment.

FIG. 5 is a block diagram showing a configuration of a second embodiment.

FIG. 6 is a block diagram showing the configuration of a third embodiment.

FIG. 7 is a configuration diagram showing a fourth embodiment.

[Explanation of symbols]

 201 printer body (apparatus body) 202 ink cartridge (ink supply means) 204 CPU (detection means, change means) 217 switch transistor (switch means) 218 lithium battery (power supply) 219 cartridge mounting detection terminal 220 cartridge mounting detection terminal 501 Power supply path 601 Power supply path 701 Switch

Claims (5)

[Claims] 1. A memory having exchangeable ink supply means for supplying recording ink to a recording section, storing a memory of the attached ink supply means, and a memory for storing the information when the memory content is lost. Detection means for detecting, power supply for supplying power to the memory when the power supply of the apparatus main body is not turned on, and changing means for changing the stored contents of the memory when the ink supply means is detached when the power supply of the apparatus main body is not turned on A recording apparatus, comprising: a detection unit that detects detachment of the ink supply unit from the output of the detection unit when the power of the apparatus main body is turned on again. 2. The changing means has a switch means for switching the power supply to the memory according to the attachment / detachment state of the ink supply means, and stops the power supply to the memory when the ink supply means is detached. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus. 3. The changing unit has a power supply path for supplying power from a power source to the memory via the ink supply unit,
2. The recording apparatus according to claim 1, wherein the power supply to the memory is stopped when the ink supply unit is detached. 4. A power supply for supplying power to the memory is provided on the ink supply means side, and the changing means has a power supply path from the ink supply means to the memory, and the power supply to the memory when the ink supply means is detached. The recording apparatus according to claim 1, wherein the supply is stopped. 5. The recording apparatus according to claim 1, wherein the changing unit stores the uncertain data in the memory when the ink supply unit is detached.