CN212604057U

CN212604057U - Ink box chip, ink box and ink-jet printer

Info

Publication number: CN212604057U
Application number: CN202021731691.XU
Authority: CN
Inventors: 文冠果; 付志平
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2020-07-22
Filing date: 2020-08-18
Publication date: 2021-02-26
Anticipated expiration: 2030-08-18
Also published as: CN111923598A

Abstract

The utility model provides an ink box chip, ink box and ink jet printer, this ink box chip includes the base plate, is equipped with memory and a plurality of connecting terminal on the base plate, and a plurality of connecting terminal include a plurality of first terminals of being connected with the memory electricity, and a plurality of connecting terminal still include at least one high voltage terminal; the substrate is provided with a first energy storage device, the first energy storage device supplies power to the memory through a first switch device, the first switch device is controlled to be switched on and switched off by a second switch device, and the second switch device is switched on within a preset time after a high-level signal is output by a high-voltage terminal and converted into a low-level signal. The side wall of the box body of the ink box is provided with the ink box chip, and the ink box can be installed on the ink-jet printer. The utility model discloses the high pressure that can avoid the output of high-voltage terminal causes the damage to the memory.

Description

Ink box chip, ink box and ink-jet printer

Technical Field

The utility model relates to a printing consumables field, it is specific, relate to an ink horn chip, ink horn and ink jet printer that have above-mentioned ink horn chip.

Background

The electronic imaging equipment is taken as common office equipment, great convenience is provided for modern office, the common electronic imaging equipment comprises a printer, a copying machine and the like, the existing printer is divided into an ink-jet printer and a laser printer, and the ink-jet printer uses an ink box containing ink as an ink box to jet the ink to paper so as to form characters or patterns to be printed on the paper; the laser printer uses a toner cartridge containing toner as an ink cartridge to form characters or patterns to be printed on a medium.

Referring to fig. 1, a conventional color inkjet printer has a cabinet 11, and the inkjet printer shown in fig. 1 omits a tray of the cabinet 11. The casing 11 is provided with a movement 12 of the ink jet printer and with a slide along which a carriage 14 is driven by a motor (not visible in fig. 1). An adapter plate (not visible in fig. 1) is provided in the carriage 14, and communicates with the movement 12 via the flat cable 13.

A plurality of ink cartridges 15 are detachably mounted on the carriage 14, and different ink cartridges 15 contain different color inks. The structure of the ink cartridge 15 is shown in fig. 2. The ink cartridge 15 has a cartridge body 16, the cartridge body 16 encloses a cavity for accommodating ink, an ink outlet 17 is provided at a lower end of the cavity, and the ink in the cavity flows out through the ink outlet 17 and supplies ink to an ink supply needle of the printing carriage 14.

A chip 18 is mounted on the outer wall of the casing 16 of the cartridge 15, the chip 18 having a substrate with a plurality of connection terminals 19 on one side for electrical connection with the adapter plate. The other side of the substrate is provided with a memory (not visible in fig. 2), which is usually a non-volatile memory, such as an EEPROM or a FLASH, and stores information related to the ink cartridge, including variable information and invariable information, where the variable information is information that is constantly changed with the printing operation, such as information about the remaining amount of ink, the printing duration, the number of printed sheets, and the invariable information is information that is not changed with the printing operation, such as the type of the ink cartridge, the type of an applicable inkjet printer, and the color of ink.

After the ink cartridge 15 is mounted to the carriage 14 of the ink jet printer, the ink jet printer powers up the chip 18 and reads the data stored in the memory of the chip 18 to determine whether the ink cartridge 15 is of the proper type, whether the amount of ink remaining in the ink cartridge 15 is sufficient, and the like. The ink jet printer can perform the printing operation only after the ink cartridge 15 is judged to be of a proper type and the ink cartridge 15 contains sufficient ink.

Referring to fig. 3, 9 connection terminals are provided on one surface of the substrate 20 of the chip 18, and a plurality of the connection terminals are arranged in two upper and lower rows, wherein a first row located above includes four connection terminals, respectively,

connection terminals

21, 22, 23, 24, and a second row located below includes five connection terminals, respectively,

connection terminals

25, 26, 27, 28, 29. These connection terminals are divided into three groups, the first group of connection terminals being the connection terminals electrically connected to the memory, usually located in the middle of each row of connection terminals, for example the

connection terminals

22, 23, 26, 27, 28 being the connection terminals for connection to the memory. The two

connection terminals

21, 24 at the two ends of the first row are detection terminals, and the two connection terminals at the two ends of the second row are

high voltage terminals

25, 29.

The

detection terminals

21, 24 may have a plurality of functions, the first function being to detect whether the ink cartridge 15 is mounted in place, and if the

detection terminals

21, 24 are electrically connected to the corresponding connection terminals on the ink jet printer side, it can be considered that the ink cartridge has been mounted in place. The second function is to identify the type of the ink cartridge, for example, the

detection terminals

21 and 24 may be connected to the

connection terminals

22 and 23 differently, and the ink jet printer determines the type of the ink jet printer by detecting the levels of the

detection terminals

21 and 24, thereby determining whether the ink cartridge 15 is erroneously mounted.

The sensor is provided in the ink cartridge 15 to detect the remaining amount of ink, but a high voltage is applied to the sensor when the sensor is operated, and therefore, the

high voltage terminals

25 and 29 receive a high voltage direct current supplied from the ink jet printer and are applied to both ends of the sensor. However, if an ink droplet is dropped between the plurality of connection terminals, a short circuit occurs between the plurality of connection terminals, for example, the ink droplet is dropped between the

connection terminals

21, 25, and 26, and once the high voltage terminal 25 is applied with a high dc voltage, the voltage of the connection terminal 26 is high. If the connection terminal 26 is a connection terminal for passing power to the memory, also called a power supply terminal, since the operating voltage of the memory is usually about 3.3 volts, if the connection terminal 26 is applied with a higher voltage, the memory will burn out, and even the operation of the inkjet printer will be affected.

Therefore, a detection circuit is arranged in the machine core of the ink-jet printer, the voltage of the detection terminal 21 is detected to judge whether abnormal phenomena occur or not, for example, ink drops drop among the

connection terminals

21, 25 and 26, when the high-voltage terminal 25 is loaded with high direct-current voltage, the voltage of the detection terminal 21 is increased, and once the ink-jet printer detects that the voltage of the detection terminal 21 is overhigh, the high-voltage direct current is disconnected from being loaded to the high-voltage terminal 25, so that the damage to a memory caused by the high voltage of the connection terminal 26 is avoided.

However, since the detection circuit is disposed in the housing of the inkjet printer, the inkjet printer can determine the level of the detection terminal 21 and then disconnect the power supply to the high voltage terminal 25 after the electrical signal of the detection terminal 21 needs to be transmitted to the inkjet printer. In general, it often takes several milliseconds from the detection of an excessively high level of the detection terminal 21 to the disconnection of the power supply to the high voltage terminal 25, possibly resulting in memory damage. In addition, if the detection terminal 21 is abnormal or the detection circuit is abnormal and is not detected in time when the high-voltage terminal 25 and the connection terminal 26 are short-circuited, the memory is easily damaged due to the excessive voltage applied to the power supply terminal on the substrate 20 for a long time.

SUMMERY OF THE UTILITY MODEL

The first objective of the present invention is to provide an ink cartridge chip capable of effectively preventing a memory from being loaded with too high voltage.

The second objective of the present invention is to provide an ink cartridge using the above ink cartridge chip.

The third objective of the present invention is to provide an ink jet printer with the above ink cartridge.

In order to achieve the first object of the present invention, the ink cartridge chip provided by the present invention comprises a substrate, a memory and a plurality of connection terminals are disposed on the substrate, the plurality of connection terminals comprise a plurality of first terminals electrically connected to the memory, and the plurality of connection terminals further comprise at least one high voltage terminal; the substrate is provided with a first energy storage device, the first energy storage device supplies power to the memory through a first switch device, the first switch device is controlled to be switched on and switched off by a second switch device, and the second switch device is switched on within a preset time after a high-level signal is output by a high-voltage terminal and converted into a low-level signal.

According to the scheme, the first energy storage device supplies power to the memory, the second switching device is conducted within a period of time after the high-voltage terminal outputs a high-level signal and converts the high-level signal into a low-level signal, and therefore the first switching device is controlled to be conducted, and the first energy storage device supplies power to the first switching device. That is to say, when the high-voltage terminal is in the high level state for a long time, perhaps is in the low level state for a long time, the second switching device is all nonconducting, and like this, first energy memory device can not be to memory power supply, avoids the electric quantity of first energy memory device to consume fast. Furthermore, since the memory is not supplied with power from the first connection terminal, even if the first connection terminal is applied with a higher voltage, no damage to the memory is caused.

Preferably, the second switching device is connected between the second energy storage device and the control terminal of the first switching device, and the control terminal of the second switching device is connected to the third energy storage device.

Therefore, the voltage of the second energy storage device and the voltage of the third energy storage device are changed through the charging and discharging relation between the third energy storage device and the second energy storage device, the on-off state of the second switch device is changed, and the on-off time of the second switch device can be controlled.

The further scheme is that a first diode is connected between the third energy storage device and the second energy storage device, the anode end of the first diode is connected to the third energy storage device, and the cathode end of the first diode is connected to the second energy storage device.

Therefore, the current can be prevented from flowing to the third energy storage device from the second energy storage device through the first diode, the current can only flow in a single direction, and the control requirement of the second switching device is met.

In a further aspect, the third energy storage device is further connected to the first energy consumption device. Therefore, the discharge of the third energy storage device is realized through the first energy consumption device, so that the voltage of the third energy storage device is changed, and the on-off state of the second switch device is changed.

In a further embodiment, the high voltage terminal supplies power to the third energy storage device, and preferably, the high voltage terminal supplies power to the third energy storage device through the second diode.

Therefore, the high-voltage terminal supplies power to the third energy storage device through the second diode, the charge and discharge control of the level signals output by the high-voltage terminal on the plurality of energy storage devices is realized, and the on-off state of the two switch devices is further controlled.

The second energy storage device discharges to the second energy consumption device through the second switching device.

Therefore, the second energy storage device can be discharged through the second energy consumption device, the second energy storage device is prevented from being in a high level state for a long time, and accordingly the electric quantity of the first energy storage device is prevented from being released too fast.

In a further aspect, the first switching device is a high level turn-on device and the second switching device is a low level turn-on device.

For the second purpose that realizes, the utility model provides an ink box includes the box body, and the box body encloses into one and holds the chamber to, be provided with foretell ink box chip on the outer wall of box body.

In order to achieve the third objective, the present invention provides an ink jet printer including a body, and the above-mentioned ink cartridge installed in the body.

Drawings

Fig. 1 is a structural view of a conventional ink jet printer.

Fig. 2 is a structural view of a conventional ink cartridge.

Fig. 3 is a structural view of a conventional ink cartridge chip.

Fig. 4 is a structural diagram of an embodiment of the ink cartridge chip of the present invention.

Fig. 5 is an electrical schematic diagram of an embodiment of an ink cartridge chip of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

The ink cartridge of the present invention is an ink cartridge mounted on an ink jet printer, and the present invention will be described in detail with reference to the following embodiments.

The ink cartridge chip of the present embodiment is an ink cartridge chip mounted on an ink cartridge for an ink jet printer, and has a substrate 40, and a plurality of connection terminals are provided on one surface of the substrate 40, and as shown in fig. 4, the plurality of connection terminals are arranged in two rows, wherein the first row located above includes four

connection terminals

41, 42, 43, and 44, respectively, and the second row located below also includes four

connection terminals

45, 47, 48, and 49, respectively. Referring to fig. 5, a memory 50 is provided on the other surface of the substrate 40, and the memory 50 is a nonvolatile memory such as an EFFROM or FLASH.

In the embodiment, the plurality of connection terminals on the substrate 40 are divided into three groups, the first group of connection terminals are the

first connection terminals

42, 43, 47, 48, the first connection terminals include the clock signal terminal CLK, the data terminal DAT, the chip select terminal SC, the ground terminal GND, and the like, and the first connection terminals are electrically connected to the memory 50. As can be seen from fig. 4, these connection terminals are located at the middle of each row of connection terminals. In the present embodiment, the four first terminals do not include a power supply terminal that receives a dc voltage output from the inkjet printer and directly supplies power to the memory 50.

The second group of connection terminals are two

connection terminals

41, 44 at both ends of the first row, the

connection terminals

41, 44 are detection terminals, and the third group of connection terminals are two

connection terminals

45, 49 at both ends of the second row, these two connection terminals being high voltage terminals.

In the ink cartridge, a device having a high operating voltage, for example, a sensor for detecting the remaining amount of ink, such as a crystal oscillator, is provided, and

high voltage terminals

45 and 49 are connected to both ends of the sensor, respectively. When the ink jet printer needs to detect the ink residual amount, a high direct current voltage is loaded to the

high voltage terminals

45 and 49 so that the crystal oscillator generates an oscillation signal. However, since the operation of detecting the remaining amount of ink is not performed in real time, and is usually performed before the start of one printing operation or after the completion of the printing operation, the high-

voltage terminals

45 and 49 are not applied with a high dc voltage in real time, but are applied with a high dc voltage at a specific timing. Generally, the direct current voltage applied to the

high voltage terminals

45 and 49 by the ink jet printer is more than 25v, and in the prior art, a power terminal is provided on the cartridge chip, and if the high voltage terminal and the power terminal are short-circuited, a higher direct current voltage is directly applied to a power pin (VCC pin) of the memory, so that the memory is damaged, which is also the most main reason for the damage of the memory of the existing cartridge chip.

In addition, since the inkjet printer often needs to load a high-level signal, for example, a dc voltage of 25V or more, to the high-

voltage terminals

45 and 49 for a short time before reading data in the memory 50 or before writing data in the memory 50, the high-level signal loaded for a short time is used to control the power supply of the memory 50 in this embodiment.

Referring to fig. 5, the memory 50 is powered by a storage battery, and the storage battery of this embodiment is a non-chargeable storage battery, that is, the storage battery is packaged in a cartridge chip and cannot be charged, but can be discharged. Because the area of the ink box chip is very small, the space for installing the ink box chip on the ink box is also very small, and a storage battery with a larger volume cannot be arranged on the ink box chip, the electric energy stored by the storage battery is limited, and the discharging time of the storage battery needs to be strictly controlled. The battery supplies a dc voltage of 3.3V, which is VDD in fig. 5, to the memory 50.

In this embodiment, the discharging of the battery is controlled by the fet T1 as the first switching device, the fet T1 is a high-level conducting fet, the drain of which is connected to the battery, the source of which is connected to the memory 50, and the gate of which is connected to the fet T2 as the control terminal. The fet T2, which is the second switching device of the present embodiment, is a low-level conduction device, and the drain of the fet T2 is connected to the gate of the fet T1. In addition, the drain of the fet T2 is also connected to a resistor R2.

The source of the fet T2 is connected to the capacitor C2, in this embodiment, the capacitor C2 is the second energy storage device, the resistor R2 is the second energy consuming device, and when the fet T2 is turned on, the capacitor C2 can discharge to the resistor R2.

The gate of the fet T2 is connected to the capacitor C3 as the third energy storage device and also connected to the resistor R1 as the first energy dissipation device, and a diode D1 as the first diode is connected between the capacitor C3 and the capacitor C2, the anode of the diode D1 is connected to the capacitor C3, and the cathode of the diode D1 is connected to the capacitor C2.

In addition, the high voltage terminal 45 may supply power to the capacitor C3 through a diode D2 as a second diode, an anode terminal of the diode D2 is connected to the high voltage terminal 45, a cathode terminal is connected to one end of a resistor R3, and the other end of the resistor R3 is connected to a resistor R1.

When the high voltage terminal 45 is not applied with the high level signal by the inkjet printer, the high voltage terminal 45 outputs the low level signal, i.e., the diode D2 is not conductive, and at this time, the point a is the low level signal, and the fet T2 is in a conductive state. However, since the capacitor C3 and the capacitor C2 are not charged, the signal at the point B is also a low level signal, the capacitor C2 cannot discharge to the resistor R2, the signal at the point C is also a low level signal, the fet T1 is in an off state, and the battery cannot supply power to the memory 50.

When the ink jet printer applies a high level signal to the high voltage terminal 45, for example, the ink jet printer applies a high level signal to the high voltage terminal 45 for a long period of time, the dc voltage of the high voltage terminal 45 passes through the diode D2 and the resistor R3 and charges the capacitor C3, at this time, the point a is a high level signal, and the gate of the fet T2 is at a high level and is in an off state. Since point a is high, current will flow through diode D1 and charge capacitor C2. However, since the fet T2 is in the off state, the current cannot flow to the resistor R2 through the fet T2, the point C is still in the low level state, the signal received by the gate of the fet T1 is a low level signal, the fet T1 is still off, and the battery cannot supply power to the memory 50.

Only before the ink jet printer needs to write data into the memory 50 or read data from the memory 50, the ink jet printer applies a high level signal to the high voltage terminal 45 for a short time and immediately after the high level signal is applied, the high level signal is often only several tens milliseconds to several hundreds milliseconds in duration.

After the high voltage terminal 45 is applied with the high level signal, the capacitor C3 starts to charge, but the capacitor C2 charges very little power due to the short duration of the high level, and therefore, the B point is still in the low level state. In the time period when the high voltage terminal 45 is applied with the high level signal, the point a is the high level signal, the fet T2 is turned off, the gate of the fet T1 is also the low level signal and is turned off, and the battery cannot discharge to the memory 50.

When the level signal output from the high voltage terminal 45 is converted into a low level signal for a while, the point a keeps a high level for a while because the capacitor C3 is continuously discharged, at this time, the capacitor C3 is discharged through the resistor R1, and the current of the capacitor C3 can pass through the diode D1 to charge the capacitor C2. Since the fet T2 remains in the off state, the capacitor C2 does not discharge, and the voltage drop at point B gradually increases. As the capacitor C3 continues to discharge, the voltage at point a gradually decreases, and when the voltage at point a is lower than the voltage at point B (or the voltage at point a decreases to a low level), the fet T2 is turned on, the capacitor C2 discharges to the resistor R2 through the fet T2, at this time, a voltage is developed across the resistor R2, the signal at point C is a high level, the fet T1 is turned on, and the battery supplies power to the memory 50.

Because the amount of electricity stored in the capacitor C2 is limited, the capacitor C2 will discharge after a certain period of time, and the high state at point C can only be maintained for a short time, for example, only one or two seconds, so the on-time of the fet T1 can only be maintained for a short time. Since the communication between the ink jet printer and the memory 50 is often completed in a very short time, the on time of the fet T1 can meet the requirement of the ink jet printer to read data from and write data to the memory 50.

After the capacitor C2 finishes discharging, the point C becomes a low level signal, the field effect transistor T1 returns to a cut-off state again, and the storage battery can not supply power to the storage 50, so that the situation that the storage battery supplies power to the storage 50 for a long time to cause the over-fast consumption of the electric energy of the storage battery is avoided, and the electric energy of the storage battery can be maintained for a long time. The time for discharging the storage battery to the storage 50 each time depends on the discharge time of the capacitor C2, so that the capacitor C2 with a proper capacity can be set according to actual requirements to meet the requirement for discharging the storage battery to the storage 50.

It can be seen that if the high voltage terminal 45 is in a low level state for a long time or in a high level state for a long time, the fet T1 is turned off, and only in a very short time when the high voltage terminal is converted into a low level after being loaded with a high level, the fet T1 is turned on, and the battery supplies power to the memory 50, so that the electric quantity of the battery is prevented from being consumed too quickly, and the ink cartridge chip can be used for a long time.

Since the power used by the memory 50 is supplied by the secondary battery in this embodiment, it is not necessary to provide a power supply terminal on the substrate 40 for receiving the dc voltage output from the inkjet printer and directly supplying the power to the memory 50, and therefore, there is no problem that the memory 50 is damaged due to the power supply terminal being applied with an excessively high voltage.

It should be noted that, in the above embodiments, the storage battery is used as the first energy storage device, and in practical application, a rechargeable battery or a farad capacitor or the like may be used as the first energy storage device.

Ink cartridge example:

the embodiment has a casing, and the casing encloses into a cavity that holds the ink, is equipped with the ink outlet with the cavity intercommunication in the below of cavity, and the ink accessible in the cavity flows out through the ink outlet. And, detachably installs an ink horn chip according to the utility model discloses above-mentioned embodiment on an outer wall of casing.

Inkjet printer example:

the ink jet printer of this embodiment is provided with a body in which a housing chamber for housing the ink cartridge is formed.

Finally, it should be emphasized that the present invention is not limited to the above-mentioned embodiments, the switching device used is not necessarily a field effect transistor, and a triode may be used instead of the field effect transistor, and these changes should be included in the protection scope of the present invention.

Claims

1. An ink cartridge chip comprising:

the circuit board comprises a substrate, a memory and a plurality of connecting terminals, wherein the substrate is provided with the memory and the connecting terminals comprise a plurality of first terminals electrically connected with the memory, and the connecting terminals also comprise at least one high-voltage terminal;

the method is characterized in that:

the high-voltage terminal is provided with a first energy storage device, the first energy storage device supplies power to the memory through a first switch device, the first switch device is controlled to be switched on and off by a second switch device, and the second switch device is switched on within a preset time after the high-voltage terminal outputs a high-level signal and the high-level signal is converted into a low-level signal.

2. The cartridge chip of claim 1 wherein:

the second switching device is connected between the second energy storage device and the control end of the first switching device, and the control end of the second switching device is connected with a third energy storage device.

3. The cartridge chip of claim 2 wherein:

and a first diode is connected between the third energy storage device and the second energy storage device, the anode end of the first diode is connected to the third energy storage device, and the cathode end of the first diode is connected to the second energy storage device.

4. The cartridge chip of claim 2 or 3 wherein:

the third energy storage device is also connected with a first energy consumption device.

5. The cartridge chip of claim 4 wherein:

the high voltage terminal supplies power to the third energy storage device.

6. The cartridge chip of claim 5 wherein:

the high voltage terminal supplies power to the third energy storage device through a second diode.

7. The cartridge chip of claim 2 or 3 wherein:

the second energy storage device discharges electricity to the second energy consumption device through the second switching device.

8. The cartridge chip according to any one of claims 1 to 3 wherein:

the first switching device is a high level conducting device, and the second switching device is a low level conducting device.

9. An ink cartridge, comprising:

the box body is enclosed into an accommodating cavity;

the method is characterized in that:

the cartridge chip according to any one of claims 1 to 8 is provided on an outer wall of the cartridge body.

10. An ink jet printer comprising a body in which the ink cartridge according to claim 9 is mounted.