CN205439259U - Liquid spray box structure - Google Patents

Abstract

The utility model is a liquid jet cartridge structure for inkjet printing of at least one liquid, comprising a printing chip and a heating resistor of at least one axial array arranged on the liquid jet chip and extending longitudinally, the length of the printing chip is between 15.1 millimeters (mm) and 15.7 millimeters (mm), the width of the printing chip is between 5.8 millimeters (mm) and 6.2 millimeters (mm), and the length-to-width ratio of the printing chip is between 2.4 and 2.7 times.

Description

Liquid spray box structure

【Technical field】

The utility model relates to a liquid spray box structure, in particular to a liquid spray box structure suitable for three-dimensional printing.

【Background technique】

Rapid prototyping technology (RP technology for short) is developed based on the concept of building a layer-by-layer stacking layer similar to a pyramid. Automatically and quickly convert the design scheme of any complex shape into a 3D solid model, which greatly shortens the research and development cycle of new products and reduces the cost of research and development, and can ensure the time to market of new products and the first-time success rate of new product development. Rapid prototyping technology It provides a more complete and convenient product design communication tool for technical personnel, as well as between technical personnel and enterprise decision makers, product users and other non-technical personnel, thus significantly improving the competitiveness of products in the market and business-to-business The rapid response ability of the market.

At present, RP technology has developed a method of using jet printing technology combined with vehicle precision positioning technology to produce 3D solid models. The production method is to first lay a layer of powder on the top of the vehicle and use liquid jet printing technology to spray print on part of the powder. The high-viscosity binder makes the binder stick to the powder and solidifies, and repeats the above-mentioned process layer by layer to complete the 3D solid model.

It is known that the printing module adopted by the general liquid jet printing technology is usually applied to the RP technology, for example, as shown in Figure 1, the printing module 1 adopted by the general liquid jet printing technology is arranged on a main body (not shown pattern) for printing. The printing module 1 includes a printing platform 10, a bearing seat 11, and at least one liquid spray box 12. The printing platform 10 includes a frame body 101 and a transmission shaft 102 straddling the frame body 101. The bearing seat 11 passes through the On the transmission shaft 102, the at least one liquid spray box 12 is usually provided with two liquid spray boxes, that is, as shown in FIG. (C), yellow (Y), magenta (M)) the second liquid spray box 122, and the liquid spray box 12 is correspondingly arranged on the bearing seat 11, so the bearing seat 11 and the spray liquid installed thereon The cartridge 12 can perform X-axis reciprocating motion relative to the transmission shaft 102 of the printing platform 10 .

When the printing module 1 performs the jet printing operation of RP technology, the jet printing platform 10 carries the bearing seat 11 and the liquid jet box 12 arranged thereon to carry out a reciprocating action in the Y-axis direction, and then Through the reciprocating movement of the liquid spray box 12 in the X-axis direction that can move left and right along the transmission shaft 102 on the bearing seat 11, through the reciprocating movement of the X-axis and Y-axis directions alternately, The spray liquids of various colors contained in the liquid spray box 12 can be sprayed on the construction materials (not shown) laid on the construction carrier (not shown), and the above-mentioned process has been repeated to implement the operation of stacking layers, and then A solid model (not shown) of the 3D object can be completed.

However, when the rapid prototyping printing operation of this 3D object is implemented, in addition to containing the black and color spray liquids in the liquid spray box 12, it is necessary to additionally contain a high-viscosity adhesive to bond the construction materials. Furthermore, it can be stacked layer by layer to form a 3D object. Therefore, the traditional rapid prototyping device needs to be equipped with an additional carrier and a liquid spray box for accommodating high-viscosity adhesives. The overall volume increases, and at the same time, the cost of the carrier frame and the liquid spray box is increased.

It is known that the liquid spray box structure can include a printing chip, a heating resistor and an orifice plate, wherein the liquid spray box structure is assembled on the body of a liquid storage box, and the heating resistance is controlled by the printing chip, and the liquid storage box will provide spraying. liquid to the heating resistor, so that the heating resistor heats the spray liquid in response to the trigger of the printing chip, so that the spray liquid stored in the liquid storage box is heated and sprayed onto the three-dimensional object through the corresponding nozzle hole of the orifice plate. As for the liquid The control of the liquid droplet time corresponds to the pixels of the pattern to be printed.

Usually the liquid storage box is set inside the liquid spraying device, and is driven by a carrying system to move laterally above the three-dimensional object, so that the liquid spray box of the liquid storage box can move to the correct position according to the pattern to be printed To perform liquid spraying, that is, the carrying system causes relative motion between the liquid spraying box and the three-dimensional object along a scanning axis, wherein the scanning axis refers to the direction parallel to the width of the three-dimensional object, and a single scan of the driving component means that the carrying system drives The spray cartridge is moved once across approximately the entire width of the three-dimensional object, however between individual scans the three-dimensional object will advance relative to the spray cartridge along a feed axis perpendicular to the scan axis, i.e. along the length of the three-dimensional object. direction.

When the spray box moves along the scanning axis, a line of discontinuous lines will be generated, and all the discontinuous lines are combined to form the text or image of the printed pattern. As for the printing resolution along the feed axis of the three-dimensional object, it is determined It is called the density of discontinuous lines along the feed axis of the three-dimensional object, so the greater the density of discontinuous lines on the feed axis of the inkjet media, the higher the printing resolution along that axis.

The known technology is to increase the density of the intermittent lines along the advancing axis of the three-dimensional object by increasing the number of heating resistors of the liquid jet box, so as to increase the printing resolution and improve the printing speed, although increasing the number of heating resistors of the liquid jet box can To speed up the printing speed, but many heating resistors will generate a lot of heat to make the temperature of the liquid injection box rise rapidly, which will not only affect the printing quality but may even damage the entire liquid injection box.

At present, one of the solutions developed by the industry is to increase the size of the liquid spray box to avoid the rapid rise of the temperature of the liquid spray box. However, for the highly competitive liquid jet printing market, the price of the liquid spray device has dropped. Very quickly, increasing the size of the liquid injection cartridge will increase the cost of producing the liquid injection device, reducing market competitiveness.

Moreover, when the number of nozzle holes in the liquid spray box is large, the liquid spray box will be designed as a serial transmission to save the number of input/output (I/O) of the printing chip, but because the control method for driving the heating resistor required by the printing chip It is still necessary to combine address control and print data signals, but it is known that the design method for address control in the printing chip is that when the number of addresses for controlling the heating of the liquid spray box is n, the position decoder needs to be provided with n lines for Connect to the corresponding inkjet drive circuit. For example, when the number of addresses for controlling the heating of the liquid jet box is 20, the position decoder needs to be provided with 20 cables. However, as the number of heating resistors increases, it is known that The design of the chip will increase the area of the chip, and increase the size of the printed chip of the liquid jet cartridge, so how to reduce the way of address control is an important issue for saving the area of the printed chip.

Therefore, how to develop a liquid spray box structure that can improve the lack of the above-mentioned known technology is also an urgent problem to be solved at present.

【Content of utility model】

The main purpose of the utility model is to provide a liquid spray box structure, which can realize high-resolution high-speed printing, and at the same time, reduce costs due to effective use of the space of the liquid spray box, and provide light and cheap components to achieve high-performance printing.

In order to achieve the above purpose, a broad implementation of the present utility model is to provide a liquid jet box structure for inkjet printing of at least one liquid, including a jet printing chip and a chip arranged on the liquid jet chip and Heating resistors arrayed along at least one axis extending longitudinally, the length of the jet-printed chip is between 15.1 millimeters (mm) and 15.7 millimeters (mm), and the width of the jet-printed chip is between 5.8 millimeters (mm) and 6.2 millimeters (mm) The length-to-width ratio of the jet-printed chip ranges from 2.4 to 2.7 times.

Another object of the present utility model is to provide a liquid spray box structure to solve the known problem of increasing the size of the printed chip by increasing the number of heating resistors in the liquid spray box, which will increase the cost of producing the liquid spray device, and the known address control The method will increase the area of the printed chip and other disadvantages.

In order to achieve the above purpose, the utility model also provides a liquid jet box structure, including an ink jet control circuit, receiving several gate signals, several clock signals, a data signal, an address signal, a heating control signal, A preheating control signal and a power signal, including: a data signal converter, receiving a serial data signal, and converting it into several parallel data signal outputs; an address signal converter, receiving a serial address signal, and converting output into several first parallel address signals and several second parallel address signals; a main address decoder, connected with the address signal converter, is used to decode several of the first parallel address signals into several third parallel address signals address signal; a primary address decoder, connected to the address signal converter, for decoding several second parallel address signals into several fourth parallel address signals; a buffer, receiving a heating signal and a preheating signal , used to remove the heating signal and the noise processing of the preheating signal to stabilize the output; and a plurality of inkjet driving circuits, each inkjet driving circuit includes: a main preheating control circuit; a print data gate, receiving the main address One of the third parallel address signals of the decoder, one of the fourth parallel address signals of the sub-address decoder and one of the parallel data signals of the data signal converter, to perform a logic operation and output a print data signal to be connected to the main preheating control circuit; a preheating data gate to receive one of the third parallel address signals of the main address decoder and one of the fourth parallel address signals of the secondary address decoder , to carry out logical operation and output a preheating data signal, to connect and input to the main preheating control circuit; a heating control reverse circuit, to receive and input the heating control signal, to output a heating control signal or a reverse heating control signal to the main preheating control circuit; a preheating control reverse circuit, receiving and inputting the preheating control signal to output a preheating control signal or a reverse preheating control signal to the main preheating control circuit; A drive transistor switch, with a control terminal connected to the main preheating control circuit, and with an input terminal and an output terminal, and the output terminal is connected to ground; and a heating resistor, receiving a power signal, and connected to the drive An input end of the transistor switch is connected.

Another object of the present utility model is to provide a liquid spray box structure, which is suitable for the printing module of the rapid prototyping device, which has a modular liquid spray box, and each liquid spray box has three liquid storage chambers, and two of them The liquid storage chambers are used to accommodate spray liquids of different colors, and the first liquid storage chamber is used to accommodate adhesives, and at the same time, the jet printing operation of rapid prototyping of 3D objects can be implemented.

In order to achieve the above purpose, a broad implementation of the utility model is to provide a liquid spray box structure, which is implemented in the printing module of the rapid prototyping device. The printing module includes: a printing platform with a frame and a transmission shaft, and The shaft is straddled on the frame body; the bearing seat is installed on the transmission shaft; and at least two identical modular liquid spray boxes are correspondingly arranged on the support seat, wherein the liquid spray box has a box body, and three boxes are arranged in the box body. The liquid storage chamber is used to hold different printing liquids respectively, and at least one of the same printing liquids is accommodated in at least two identical modular liquid spraying boxes, so as to implement rapid prototyping printing operations.

Another purpose of the present utility model is to provide a liquid spray box structure which is to design the timing signal of the address signal An corresponding to the print data signal PD, and design the preheating data signal PFD as a timing signal corresponding to the address signal An-1 In this way, all the heating resistors will not keep warming up all the time, so as to avoid the accumulation of a relatively high temperature in the entire liquid injection chip, which will affect the execution efficiency of the liquid injection chip or more seriously cause the heating resistor R of the liquid injection chip to burn out and fail to work. .

In order to achieve the above purpose, a broad implementation of the present utility model is to provide a liquid spray box structure, wherein the switch for receiving a printing data signal in the main preheating control circuit, the required corresponding address signal is An Timing, and the switch that receives a preheating data signal needs to correspond to the timing of the address signal An-1.

Preferably, the optimal length of the jet-printed chip is 15.4 mm.

Preferably, the optimum width of the jet printing chip is 6mm.

Preferably, the optimum aspect ratio of the jet printing chip is 2.5 times.

Preferably, the heating resistors of each axis array of the jet printing chip are arranged in at least two axis groups along axes parallel to each other and spaced apart from each other.

Preferably, the jet printing chip has 4 axis arrays and the heating resistors are arranged in 8 axis groups along axes parallel to each other and spaced apart from each other.

Preferably, each axis group of the jet printing chip has 300 heating resistors, and all the heating resistors of the jet printing chip have a total of 2400 heating resistors.

Preferably, the heating resistors of the jet-printed chip are arranged on it at a density of 24.6 to 27.4 per square millimeter.

Preferably, the density of the heating resistors printed on the chip is preferably set at a density of 25.9 per square millimeter.

Preferably, the total length of the plurality of heating resistors included in each axis group is 0.5 inches.

Preferably, the distance between two adjacent heating resistors in the same axis group is 1/600 inch.

Preferably, the liquid spray box structure further includes at least one liquid supply tank, respectively disposed between the at least two axis groups of the heating resistors of each axis array.

Preferably, each liquid supply groove has a width of 0.3 mm and a length of 12.8 mm.

Preferably, the distance between the two adjacent liquid supply tanks is 1.27 mm.

Preferably, the width of the jet printing chip is 6 mm, and the ratio of the total width of the liquid supply groove to the cross-sectional area of the jet printing chip is 20%.

Preferably, the liquid jet box structure implements a printing module of a rapid prototyping device, and the printing module includes:

A spray printing platform has a frame body and a transmission shaft, and the transmission shaft straddles the frame body;

a bearing seat, which is passed through the transmission shaft; and

At least two identical modular liquid spray boxes are correspondingly arranged on the bearing seat, wherein the liquid spray box has a box body, and the box body is provided with three liquid storage chambers for accommodating different printing liquids respectively , and the cassette body of the at least two identical modular liquid spraying cassettes contains at least one identical printing liquid, so as to implement rapid prototyping printing operations.

Preferably, the printing liquid contained in one of the liquid storage chambers is a binder, and the different printing liquids contained in the other two liquid storage chambers are color inks.

Preferably, the liquid spray box is further provided with an identification chip to identify the spray box and monitor the electrical signal communication with the rapid prototyping device.

Preferably, the liquid spray box structure comprises:

An inkjet control circuit, receiving several strobe signals, several clock signals, a data signal, an address signal, a heating control signal, a preheating control signal, and a power supply signal, including:

A data signal converter, which receives a series of data signals and converts them into several parallel data signals for output;

An address signal converter, which receives a serial address signal and converts it into several first parallel address signals and several second parallel address signals for output;

a master address decoder, connected to the address signal converter, for decoding the first parallel address signals into third parallel address signals;

A primary address decoder, connected to the address signal converter, for decoding the second parallel address signals into fourth parallel address signals;

A buffer, receiving a heating signal and a preheating signal, used to remove the noise of the heating signal and the preheating signal and process the stable output; and

A plurality of inkjet drive circuits, each inkjet drive circuit includes:

A main preheating control circuit;

a print data gate, receiving one of the third parallel address signals of the main address decoder, one of the fourth parallel address signals of the sub-address decoder and one of the parallel data signals of the data signal converter, outputting a print data signal for performing a logic operation, and connecting it to the main preheating control circuit;

A preheating data gate, receiving one of the third parallel address signals of the main address decoder and one of the fourth parallel address signals of the sub-address decoder to perform logic operations and output a preheating data signal to connect input into the main preheating control circuit;

A heating control reverse circuit, receiving and inputting the heating control signal to output a heating control signal or a reverse heating control signal to the main preheating control circuit;

A preheating control reverse circuit, receiving and inputting the preheating control signal to output a preheating control signal or a reversed preheating control signal to the main preheating control circuit;

a driving transistor switch, having a control terminal connected to the main preheating control circuit, and having an input terminal and an output terminal, and the output terminal is connected to ground; and

A heating resistor receives a power signal and is connected with an input terminal of the driving transistor switch.

Preferably, the main preheating control circuit of the inkjet drive circuit includes:

A first switch has an input terminal connected to the power signal, a control terminal connected to the control terminal of the drive transistor switch, and an output terminal;

A second switch has an input end connected to the power signal, an output end connected to the control end of the drive transistor switch and the control end of the first switch, and a control end connected to the first switch output terminal;

A third switch has a control terminal connected to the heating control signal, has an input terminal connected to the output terminal of the first switch and the control terminal of the second switch circuit, and has an output terminal;

A fourth switch has a control end connected to the print data signal, an input end connected to the output end of the third switch, and an output end connected to ground;

A fifth switch has a control terminal connected to the preheating control signal, has an input terminal connected to the input terminal of the third switch, the output terminal of the first switch and the control terminal of the second switch circuit, and has an output terminal;

A sixth switch has a control terminal connected to the preheating data signal, an input terminal connected to the output terminal of the fifth switch, and an output terminal connected to ground;

A seventh switch has a control terminal connected to the reverse heating control signal, has an input terminal connected to the control terminal of the first switch, the output terminal of the second switch and the control terminal of the drive transistor switch, and has an output terminal;

An eighth switch, having a control terminal connected to the print data signal, having an input terminal connected to the output terminal of the seventh switch, and having an output terminal connected to ground;

A ninth switch, having a control terminal connected to the reverse preheating control signal, having an input terminal connected to the input terminal of the seventh switch, the control terminal of the first switch, the output terminal of the second switch and the driving the control end of the transistor switch, and having an output end;

A tenth switch has a control terminal connected to the preheating control signal, an input terminal connected to the output terminal of the ninth switch, and an output terminal connected to ground.

Preferably, when the main preheating control circuit of the inkjet drive circuit outputs a high potential signal (with a voltage signal) from the print data gate and the preheat data gate, the print data signal is input to the fourth switch to preheat the data The signal is input to the sixth switch, and the fifth switch selects to receive the preheating control signal, so that the second switch is turned on to trigger the turn-on of the driving transistor switch, thereby prompting the heating resistor to perform a preheating action.

Preferably, when the main preheating control circuit of the inkjet drive circuit outputs a high potential signal (with a voltage signal) from the print data gate, and when the preheat data gate has no voltage signal output, the print data signal is input to the fourth switch, and the third switch selects to receive the heating control signal, so that the first switch can be used to trigger the conduction of the drive transistor switch, thereby prompting the heating resistor to perform the heating inkjet printing action.

Preferably, the fourth switch and the eighth switch are selected to receive a printing data signal, and the required corresponding address signal is the timing of An, and the sixth switch and the tenth switch are selected to receive a preheating data signal, and the corresponding address signal is An timing sequence. It needs to correspond to the timing when the address signal is An-1.

The beneficial effects of the utility model are:

The structure of the liquid spray box of the utility model mainly reduces the cost and improves the printing speed by setting more heating resistors on the chip to effectively use the space of the liquid spray box;

In a preferred embodiment, the known single address decoder can be replaced by the main address decoder and the sub-address decoder to reduce the wiring area of the liquid jet chip to reduce the chip area and make the size of the liquid jet chip Relatively small, thereby reducing the cost of producing inkjet printers.

【Description of drawings】

FIG. 1 is a schematic structural diagram of a known rapid prototyping printing module using a general jet printing technology.

Fig. 2 is a schematic structural view of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

FIG. 3A is a schematic view of the appearance of the liquid spray box structure of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

FIG. 3B is a schematic bottom view of the structure of the liquid spray box shown in FIG. 3A .

FIG. 3C is a schematic cross-sectional view of the structure of the spray box shown in FIG. 3A .

Fig. 4A is a schematic cross-sectional structure diagram of a top view of the liquid jet box structure of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

Fig. 4B is a schematic cross-sectional structure diagram of A-A' of the liquid spray box structure shown in Fig. 4A.

Fig. 5A is a schematic cross-sectional structure diagram of a top view of the liquid jet box structure of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

Fig. 5B is a schematic cross-sectional structure diagram of B-B' of the liquid spray box structure shown in Fig. 5A.

Fig. 6 is a schematic diagram of the ink configuration of the liquid jet box structure of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

FIG. 7A is a three-dimensional structural schematic view of the liquid jet chip of the liquid jet cartridge structure of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

FIG. 7B is a structural schematic diagram of removing the orifice plate from the liquid jet chip of the liquid jet cartridge structure of the printing module of the rapid prototyping device according to the first preferred embodiment of the present invention.

FIG. 8 is a schematic diagram of the connection structure between the inkjet control circuit and the liquid jet chip of the liquid jet cartridge structure.

FIG. 9A : It is a schematic diagram of the circuit structure of the liquid ejection chip of the liquid ejection cartridge structure shown in FIG. 8 .

FIG. 9B : It is a schematic diagram of the enlarged structure of the circuit in part C of FIG. 9A .

Fig. 10: It is a schematic structural diagram of the main preheating control circuit of a liquid jet chip with a liquid jet cartridge structure.

【Symbol Description】

1, 2: printing module

10, 20: printing platform

101, 201: frame body

102, 202: transmission shaft

11, 21: Bearing seat

12, 22, 22X, 22Y: spray box

121: The first spray box

122: The second spray box

220: top cover

221, 221x, 221y: box body

221a: wall

222: Flexible circuit board

222a: Electrical contact point

223, 223x, 223y, 42: liquid jet chip

223a: Orifice sheet

224, 224x, 224ax, 224bx, 224cx, 224dx, 224y, 224ay, 224by, 224cy, 224dy: liquid supply tank

225, 226, 227, 225x, 226x, 227x, 225y, 226y, 227y: reservoir

228: Droplet Generator

228a: Spray hole

228b, R: heating resistance

229: Identification chip

P: the distance between two adjacent heating resistors in one axis group

P/2: The vertical distance between two adjacent heating resistors of different axis groups

Wd2: Width of the liquid jet chip

Ld2: Length of the liquid jet chip

Ls2: the length of each liquid supply tank

Lr2: total length of each row of heating resistors

Sd2: Width of each liquid supply tank

Cd: the distance between two adjacent liquid supply tanks

41: Inkjet control circuit

clock: clock signal

Data_odd: Odd address data signal

Data_even: even address data signal

Address, An, An-1: address signal

strobe: strobe signal

HV: power supply signal

MF: heating control signal

PF: preheating control signal

MF-N: reverse heating control signal

PF-N: reverse preheating control signal

PD: print data signal

PFD: preheat data signal

Bank: circuit block

H, H1, H2: Control endpoints

COM: common connection endpoint

4211, 4212: Data signal converter

4221, 4222: address signal converter

4231, 4232: main address decoder

4241, 4242: Secondary Address Decoder

4251, 4252: Buffer

od0～od14, m0～m2, S0～S1, MA0～MA4, SA0～SA3: cable

4260: preheat data gate

4261: print datagate

MA_X, SA_Y, Data_Z: pins

4262: Main preheat control circuit

4263: Driving Transistor Switches

4264: heating control reverse circuit

4265: preheat control reverse circuit

M1: first switch

M2: second switch

M3: third switch

M4: Fourth switch

M5: fifth switch

M6: sixth switch

M7: Seventh switch

M8: Eighth switch

M9: ninth switch

M10: tenth switch

【detailed description】

Some typical embodiments embodying the features and advantages of the utility model will be described in detail in the description of the following paragraphs. It should be understood that the utility model can have various changes in different aspects, none of which departs from the scope of the utility model, and the description and illustrations therein are used for illustration in nature rather than for construction To limit the utility model.

Please refer to FIG. 2, the printing module 2 is suitable for a rapid prototyping device (not shown), and includes a printing platform 20, a bearing seat 21 and a plurality of modular liquid spray boxes 22, and the printing platform 20 includes a frame body 201 and transmission shaft 202, and the transmission shaft 202 straddles on the frame body 201, and the bearing seat 21 is penetrated on the transmission shaft 202, and in this embodiment, the plurality of modularized liquid spray boxes 22 are two identical The liquid spray boxes 22X, 22Y, the two liquid spray boxes 22X, 22Y are correspondingly arranged on the carrying seat 21, so the carrying seat 21 and the two spray liquid boxes 22X, 22Y arranged thereon can be driven with respect to the printing platform 20. The shaft 202 is reciprocally displaced in a single direction (for example, the direction of the X axis), and the printing liquid is introduced into a plurality of modular liquid spray boxes 22 to implement rapid prototyping printing operations.

When the printing module 2 performs the jet printing operation of the RP technology, the jet printing platform 20 carries the carrier 21 and the two jet cartridges 22X and 22Y arranged thereon to carry out a Y-axis reciprocating action. , and then through the two liquid injection boxes 22X, 22Y on the bearing seat 21, the reciprocating action in the X-axis direction that can move left and right along the transmission shaft 202 is carried out alternately through the X-axis and Y-axis directions. The reciprocating action can spray the spray printing liquid contained in the two spray liquid cartridges 22X, 22Y on the construction material (not shown) laid on the construction carrier (not shown), and the above process has been repeated In order to implement the operation of stacking layers, the solid model (not shown) of the 3D object can be completed.

In some embodiments, the printing liquid can be a binder and a color ink, and the color ink can be a pigment ink or a dye ink, etc., but is not limited thereto. And in some other embodiments, the printing liquid can be a colorless or monochrome printing liquid, such as transparent adhesive (T) printing liquid, cyan (C) printing liquid, yellow (Y) printing liquid Liquid, magenta (M) jet printing liquid or other color light cyan, light magenta, grayscale and other jet printing liquid, but not limited thereto.

Please refer to FIG. 3A at the same time. The liquid injection box 22 of the printing module 2 is composed of an upper cover 220, a box body 221, a flexible circuit board 222 and a liquid injection chip 223, wherein the upper cover 220 covers the box body 221. , and the liquid injection chip 223 is disposed under the box body 221, and has a liquid storage space inside the box body 221 to store the spray liquid. The box body 221 has a wall surface 221a, and when the liquid injection box 22 is mounted on a rapid prototyping device (not shown), the wall surface 221a can be set corresponding to its bearing seat 21 (as shown in FIG. 2 ). And the flexible circuit board 222 is arranged on the wall surface 221a, and has a plurality of electrical contact points 222a, when the liquid spray box 22 is arranged on the bearing seat 21 of the rapid prototyping device, through the flexible circuit of the liquid spray box 22 The electrical contact point 222a on the board 222 is electrically connected to the conducting portion (not shown) on the bearing seat 21 correspondingly. In addition, the liquid injection box 22 is further provided with an identification chip 229 to identify/control and/or monitor the electrical signal communication between the rapid prototyping device and the liquid injection chip 223 of the liquid injection box 22 .

As shown in FIG. 3B , the liquid injection chip 223 is correspondingly disposed on the bottom of the box body 221 of the liquid injection box 22 , and has a plurality of liquid supply tanks 224 . In this embodiment, the number of the plurality of liquid supply tanks is 4, but it is not limited thereto. In some other embodiments, the number of the plurality of liquid supply tanks can also be three, and the number of these liquid supply tanks can be changed arbitrarily according to actual implementation conditions, and is not limited thereto. And in this embodiment, as shown in FIG. 3C , there are three liquid storage chambers 225 , 226 , and 227 inside the box body 221 of the liquid spray box 22 . In other words, the liquid storage space inside the box body 221 is divided into three liquid storage chambers 225 , 226 , 227 for accommodating different or same color printing liquids respectively. For example, in this embodiment, the liquid storage chamber 225 is used to hold the transparent adhesive (T), the liquid storage chamber 226 is used to hold the cyan (C) colorant ink, and the liquid storage chamber 227 is used to hold the transparent adhesive (T). To accommodate magenta (M) color ink, but not limited thereto, and the three liquid storage chambers 225, 226, 227 are respectively connected to a plurality of liquid supply chambers of the liquid jet chip 223 arranged at the bottom of the box body 221 The grooves 224 are connected. Taking this embodiment as an example, the liquid storage chamber 225 communicates with the two central liquid supply tanks 224b and 224c, and is used to transport the adhesive (T) to the central two liquid supply tanks 224b and 224c. 226 is then communicated with the liquid supply tank 224a on one side, in order to deliver the cyan (C) colorant ink accommodated therein to the liquid supply tank 224a, as for the liquid storage chamber 227, then communicate with the liquid supply tank 224d on the other side are connected to deliver the magenta (M) colorant ink contained therein to the liquid supply tank 224a.

4A and 4B, it can be seen that the three liquid storage chambers 225, 226, and 227 inside the box body 221 of the liquid injection box 22 are respectively connected to the multiple liquid supply chambers of the liquid injection chip 223 arranged at the bottom of the box body 221. The grooves 224 are connected, and the internal structure of the liquid storage chamber 225 can be seen from the schematic cross-sectional structure shown in FIG. 4B . With the schematic cross-sectional structure shown in FIG. 4A , it can be seen that the transparent adhesive (T ) flows from both sides to the bottom of the liquid storage chamber 225, so as to flow to the liquid spray chip 223 at the bottom of the box body 221, and flow to the middle two liquid supply tanks 224b, 224c connected thereto for output to achieve transparent Liquid supply operation of binder (T).

Please continue to refer to FIG. 5A and FIG. 5B , the internal structures of the liquid storage chambers 225 and 226 can be seen. With the schematic cross-sectional structure shown in FIG. 5A , it can be seen that the cyan (C) color ink stored in the liquid storage chamber 226 is Flow from the liquid storage chamber 226 to the bottom, to flow to the liquid jet chip 223 at the bottom of the box body 221, and flow to the liquid supply tank 224a connected to it for output to carry out the liquid supply operation of the cyan (C) colorant ink .

As for the internal structure of the liquid storage chamber 227 in this embodiment is similar to the liquid storage chamber 226 and arranged symmetrically with each other, so its internal structure and the way of ink flow are similar to the liquid storage chamber 226, so it will not be repeated.

3C, 4A, 4B, 5A and 5B, it can be understood that the liquid spray box with 3 liquid storage chambers 225, 226, 227 in this embodiment is matched with 4 liquid supply tanks. The liquid jet chip 223 of 224 can output two-color color ink and transparent adhesive (T) at the same time, so as to facilitate the jet printing operation of rapid prototyping of 3D objects.

Please refer to FIG. 6 and shown in FIG. 2 , at least one liquid spray box 22 of the present invention can be but not limited to two liquid spray boxes 22X, 22Y, and the liquid spray boxes 22X, 22Y have three liquid storages respectively. Chambers 225x, 226x, 227x and 225y, 226y, 227y. In this embodiment, the liquid storage chamber 225x of the spray box 22X is used to accommodate the transparent adhesive (T), the liquid storage chamber 226x is used to accommodate the cyan (C) color material ink, and the liquid storage chamber 227x It is used to hold the magenta (M) color material ink, and the liquid storage chamber 225y of the liquid jet cartridge 22Y is used to hold the transparent adhesive (T), and the liquid storage chamber 226y is used to hold the yellow (Y) ink. The color ink and liquid storage chamber 227y is used for accommodating black (K) color ink, but not limited thereto. And the multiple liquid supply tanks 224x, 224y on the bottom of the liquid spraying chips 223x, 223y of the liquid spraying boxes 22X, 22Y are respectively corresponding to the liquid storage chambers 225x, 226x, 227x and 225y, 226y, 227y. connected. Taking this embodiment as an example, the liquid supply tank 224ax of the liquid ejection chip 223x of the liquid ejection cartridge 22X communicates with the liquid storage chamber 226x, and is used to correspondingly output the cyan (C) color material ink contained therein. The two liquid supply tanks 224bx and 224cx in the center of the liquid chip 223x communicate with the liquid storage chamber 225x for correspondingly outputting the transparent adhesive (T) contained therein. The liquid supply tank 224dx of the liquid jet chip 223x is connected to the The liquid storage chamber 227x is communicated for correspondingly outputting the magenta (M) color material ink contained therein. As for the liquid supply tank 224ay of the liquid ejection chip 223y of the liquid ejection cartridge 22Y, it is connected with the liquid storage chamber 226y for correspondingly outputting the yellow (Y) color material ink contained therein. The liquid supply tanks 224by and 224cy are connected to the liquid storage chamber 225y, and the liquid supply tank 224dy of the liquid jet chip 223y is also connected to the liquid storage chamber 227y for correspondingly outputting the transparent adhesive (T) contained therein. Pass, in order to correspondingly output the black (K) pigment ink that it accommodates.

In this way, by placing different color, black (K) colorant inks and transparent binders (T) and other inkjet printing liquids in the two modularized liquid spraying boxes 22X and 22Y of the utility model, you can Implement multi-color jet printing for rapid prototyping of 3D objects on rapid prototyping devices.

Please refer to FIG. 7A and FIG. 7B , the liquid ejection chip 223 is provided with a plurality of liquid supply tanks 224 . And in this embodiment, the number of the plurality of liquid supply grooves 224 is four, that is, it has liquid supply grooves 224a, 224b, 224c, 224d, and on both sides of the long axis edge of each liquid supply groove 224 A row of droplet generators 228 are respectively provided, but not limited thereto. Each row of droplet generators 228 is arranged in a staggered manner on both sides of the liquid supply tanks 224a, 224b, 224c, and 224d, so the liquid ejection chip 223 of this embodiment has 2 rows×4=8 A row of droplet generators 228, and each droplet generator 228 is composed of a heating resistor 228b and a corresponding spray hole 228a, wherein the heating resistor 228b of the droplet generator 228 is arranged on the liquid ejection chip 223 On the top, the liquid storage chambers 225, 226, and 227 that connect the liquid supply tank 224 are connected to provide the printing liquid, and the heating resistor 228b is covered by a spray hole plate 223a, and a spray hole plate 223a is provided on the spray hole plate 223a. The liquid spray hole 228a is provided corresponding to the heating resistor 228b. After the printing liquid is heated by the heating resistor 228b, thermal bubbles are formed, and liquid droplets are ejected from the liquid spray hole 228a to complete the droplet generator 228. printing effect.

Also as shown in FIG. 7B , the heating resistor 228 b of the present invention is arranged on the liquid jet chip 223 and is arrayed along at least one axis extending longitudinally. In this embodiment, the liquid ejection chip 223 has 4 axis arrays (four parallel to the direction of the reference axis L) of the liquid supply grooves 224, and are spaced side by side with respect to the vertical direction of the reference axis L, each axis The heating resistors 228b arrayed in at least two axis groups are arranged on both sides of the liquid supply tank 224, and the heating resistors 228b of one axis group are arranged in a staggered manner on both sides of the corresponding liquid supply tank 224. On the side, the liquid jet chip 223 of this embodiment is equipped with a heating electric group 228b having 8 axis groups.

The heating resistors 228b of each axis group may include 300 or more heating resistors 228b, and the total number of heating resistors 228b may reach 2400, but not limited thereto.

The distance between two adjacent heating resistors 228b in each axis group heating resistor 228b is P, and the vertical distance between two adjacent heating resistors 228b in different axis groups is P/2. In some embodiments, the distance of P can be between 1/600-1/1200 inch, and the distance of P/2 can be between 1/1200-1/2400 inch. In this embodiment, the distance of P is 1/600 inch, and the distance of P/2 is 1/1200 inch, but it is not limited thereto.

The liquid injection chip 223 of the liquid injection box 22 of the present embodiment can be a rectangular structure, the width Wd2 of the liquid injection chip 223 is about 5.8 millimeters (mm) to 6.2 millimeters (mm), and the length Ld2 of the liquid injection chip 223 is about 15.1 mm. Millimeters (mm) to 15.7 millimeters (mm), so the total area is 92.4 millimeters (mm), and the aspect ratio is Ld2/Wd2=15.1/6.2=2.4～Ld2/Wd2=15.7/5.8=2.7, so the aspect ratio range 2.4 to 2.7 times.

And the width Wd2 of the liquid jet chip 223 is preferably 6 millimeters (mm), and the length Ld2 is preferably 15.4 millimeters (mm), so the total area is 92.4 millimeters (mm), and the aspect ratio is Ld2/Wd2=15.4/6= 2.5 times is the best.

The total number of heating resistors 228b is 2400, so the density of heating resistors 228b per square millimeter (mm2) on the liquid jet chip 223 of the present invention is about 2400/(15.4×6)=25.9.

In addition, the width Sd2 of each liquid supply groove 224a, 224b, 224c, 224d can be 0.3 millimeters (mm), and the length Ls2 of each liquid supply groove 224a, 224b, 224c, 224d can be 12.8 millimeters (mm). The distance Cd between adjacent liquid supply grooves 224a, 224b, 224c, and 224d can be 1.27 millimeters (mm), so the ratio of the total width of the four liquid supply grooves 224a, 224b, 224c, and 224d to the B-B cross-sectional area of the liquid jet chip 223 is : (Sd2/Wd2)×4=(0.3mm/6mm)×4=20%.

In addition to setting more heating resistors on the chip by means of staggered arrangement, the liquid spray box of the utility model can effectively use the space of the liquid spray box to reduce the cost and increase the printing speed, and can also reduce the internal chips of the liquid spray box The address control method is used to reduce the chip area, so that the size of the liquid jet box is relatively reduced, thereby reducing the cost of producing inkjet printers.

Please refer to FIG. 8 , which is a schematic diagram of the connection structure between the inkjet control circuit and the liquid ejection chip of the liquid ejection cartridge. As shown in the figure, the inkjet control circuit 41 will transmit the clock signal clock, the odd address data signal Data_odd, the even address data signal Data_even, the address signal address, the strobe signal strobe, the heating control signal MF and the preheating control signal PF during operation. To the end of the liquid injection chip 42, to control the operation of the entire liquid injection box. Of course, the liquid ejection chip 42 must also need a power signal to control the operation of the heating resistor to eject liquid droplets.

In addition, FIG. 7B shows that the combined orifice resolution of the liquid ejection chip 42 is 1200 dots per inch (dpi). If the combined orifice resolution of the inkjet chip 42 is 600 dots per inch (dpi), as long as one of the odd address data signal Data_odd and the even address data signal Data_even exists, the above inkjet control circuit can be achieved. 41 is connected with the liquid injection chip 42 to control the operation of the circuit.

The clock signal clock is the basis for the control signal input to the liquid ejection chip 42, the odd address data signal Data_odd and the even address data signal Data_even are the print data data PD input to the liquid ejection chip 42, and the address signal address is input to the liquid ejection chip 42. The position signal is used to drive the heating circuit for inkjet printing, the strobe signal strobe is the signal for controlling the liquid jet chip 42 to latch the signal sent by the inkjet control circuit 41, and the heating control signal MF is The signal for making the heating circuit of the liquid ejection box eject liquid droplets, and the preheating control signal PF is the signal for preheating the liquid ejection chip 42 .

Please refer to FIG. 9A and B, since the inkjet control circuit 41 can divide the print data signal PD transmitted to the liquid jet chip 42 into the odd address data signal Data_odd and the even address data signal Data_even to be sent to the liquid jet chip 42 respectively, Therefore, the internal circuit of the liquid jet chip 42 is divided into two parts to respectively receive the odd-numbered address data signal Data_odd and the even-numbered address data signal Data_even and cooperate with other corresponding circuits to perform ink-jet operation. This configuration can achieve the combination of the ink-jet chip 42 The orifice resolution is 1200 dots per inch (dpi).

To achieve the combined orifice resolution of the inkjet chip 42 as 600 dots per inch (dpi), as long as the first part is configured to receive the odd address data signal Data_odd (as shown in the left half of Figure 5 (a)) or the second part then It is used to receive even address data signal Data_even (one of the right half of Fig. 5(a) is enough.

The following description will be made on the application of the combined orifice resolution of the inkjet chip 42 to 1200 dots per inch (dpi) in this embodiment.

As for, the second part is used to receive the even address data signal (as shown in the right half of Figure 5(a)). The first part is used to receive the odd address data signal Data_odd (as shown in the left half of Figure 5(a)) and by the first part A data signal converter (ser2par_odd) 4211, a first address signal converter (ser2par_address) 4221, a first main address decoder (MA) 4231, a first address decoder (SA) 4241, a first buffer (FB) 4251 and the inkjet drive circuit 426 that constitutes a plurality of banks.

And by the second data signal converter (ser2par_even) 4212, the second address signal converter (ser2par_address) 4222, the second main address decoder (MA) 4232, the second address decoder (SA) 4242, the second buffer (FB) 4252 and the inkjet drive circuit 426 that constitutes a plurality of groups of circuit blocks (Bank), since the circuit structures of the first part and the second part are substantially similar, the only difference lies in the first data signal converter 4211 and the second part. The print data signals received by the two data signal converters 4212 are either odd addresses or even addresses, so the following will only describe the first part, that is, the left half of the circuit that receives the odd address data signal Data_odd as an example, and no longer discuss the even address. The right half circuit of the address data signal Data_even.

Please refer to FIG. 9B again. The first data signal converter 4211 receives the clock signal clock, the odd address data signal Data_odd and the strobe signal strobe output by the inkjet control circuit 41, and converts the odd address data originally input in series. The signal Data_odd is converted into a 15-bit parallel signal output through the cables od0˜od14. The first address signal converter 4221 receives the clock signal clock, the address signal address and the strobe signal strobe output by the inkjet control circuit 41, and converts the address signal originally input in series into one via m0-m2 and S0-S1 cables output a total of 5-bit second parallel address signal output, in which the signals output by m0-m2 are transmitted to the first main address decoder 4231 and decoded, and output 5-bit signals from cables MA0-MA4 As for the third parallel address signal, the signals output by the cables S0-S1 are transmitted to the first-time address decoder 4241 and decoded to output a 4-bit fourth parallel address signal through the cables SA0-SA3.

The first buffer 4251 is to receive the heating control signal MF and the preheating control signal PF output by the inkjet control circuit 41, and is mainly used to remove the noise of the heating control signal and the preheating control signal and strengthen the signal driving ability to increase signal stability degree, and send the processed heating control signal and preheating control signal to the inkjet driving circuit 426.

And each inkjet driving circuit 426 mainly comprises: a main preheating control circuit 4262, a preheating data gate 4260, a printing data gate 4261, a heating control reverse circuit 4264, a preheating control reverse circuit 4265, a Drive transistor switch 4263 and a heating resistor R.

The main warm-up control circuit 4262 receives one of the third parallel address signals output by the main address decoder 4231, one of the fourth parallel address signals output by the sub-address decoder 4241 and the data signal converter 4211. Parallel one of the data signals to perform a logic operation to output a print data signal PD to be connected to the main preheating control circuit 4262, that is, the print data gate 4261 has three pins MA_X, SA_Y and Data_Z, connected to Pin MA_X is connected to one of the flat lines MA0~MA4, SA_Y is connected to one of the flat lines SA0~SA3, Data_Z is connected to one of the flat lines od0~od14, and the print data gate 4261 will receive the first main address decoding The address signal address output by the device 4231 and the first address decoder 4241, and the odd address data signal Data_odd transmitted by the first data signal converter 4211, and perform a multiplication logic operation to output an operation result, that is, a high and low potential signal .

The preheating data gate 4260 receives one of the third parallel address signals of the main address decoder 4231 and one of the fourth parallel address signals of the sub-address decoder 4241, and outputs a preheating data signal PF by logic operation. , to be connected to the main preheating control circuit 4262, that is, the preheating data gate 4260 has two pins MA_X and SA_Y, the pin MA_X is connected to one of the cables MA0-MA4, and the pin SA_Y is connected to Arranging one of the cables SA0-SA3, the warm-up data gate 4260 will receive the address signal address output by the first main address decoder 4231 and the first-time address decoder 4241, and perform a multiplication logic operation to output an operation result, That is, high and low potential signals.

The heating control reverse circuit 4264 receives the heating control signal MF to output a heating control signal MF or a reverse heating control signal MF-N to the main preheating control circuit 4262 .

The preheat control reverse circuit 4265 receives the preheat control signal PF to output a preheat control signal PF or a reverse preheat control signal PF-N to the main preheat control circuit 4262 .

The driving transistor switch 4263 has a control terminal connected to the main preheating control circuit 4262, and has an input terminal and an output terminal, and the output terminal is connected to the ground.

The heating resistor R receives a power signal (power) HV, and is connected to an input end of the driving transistor switch 4263 .

As for, the main preheating control circuit 4262 can be a boost circuit (L→H circuit), which is connected with the printing data gate 4261, the preheating data gate 4260, the heating control reverse circuit 4264, and the preheat control reverse circuit 4265. , and the heating control inversion circuit 4264, the preheating control inversion circuit 4265 are connected with the first buffer 4251 to receive the calculation result output by the print data gate 4261, and the heating control inversion circuit 4264, the preheating control inversion circuit 4265 The circuit 4265 respectively receives the heating control signal MF and the preheating control signal PF output from the first buffer 4251 .

When the operation result output by the preheating data gate 4260 is a high potential signal (with a voltage signal), the main preheating control circuit 4262 will select to receive the preheating control signal PF, and change the preheating control signal PF from a low potential signal (without voltage signal) into a high-potential signal (with a voltage signal), which is mainly used to trigger the drive transistor switch 4263 to turn on, and at the same time transmit a power supply signal HV to the heating resistor R, so that the temperature of the heating resistor R will increase, so that Partial jetting and jetting chips are preheated to a specific temperature.

Conversely, when the calculation result output by the print data gate 4261 is a high potential signal (with a voltage signal), the main preheating control circuit 4262 will select to receive the heating control signal MF, and change the heating control signal MF from a low potential signal (without voltage signal) signal) into a high-potential signal (with a voltage signal), which is mainly used to trigger the drive transistor switch 4263 to be turned on, and at the same time transmit a power supply signal HV to the heating resistor R, so that the temperature of the heating resistor R will increase, so that the The spray liquid is heated to generate air bubbles, and the spray liquid is ejected.

The inkjet drive circuit 426 included in each group of circuit blocks Bank corresponds to only one data cable, that is, one of the cable od0-od14, and the address signal address is mainly used in the liquid jet chip 42 of the present invention. It is divided into primary address signal and secondary address signal, that is, the known technology uses a single address decoder to decode the address signal address, and the utility model uses the first primary address decoder 4231 and the primary address decoder 4241 at the same time The main address signal is responsible for M bits, the secondary address signal is responsible for N bits, M and N are natural numbers, prompting the first main address decoder 4231 and the first address decoder 4241 to form M×N rows of parallel signals It is sent to the inkjet drive circuit 426 with the print data gate 4261 and the heating resistor R as the inkjet control signal.

In this embodiment, the main address signal is responsible for 5 bits, that is, M=5, and the secondary address signal is responsible for 4 bits, that is, N=4. The main address signal is the output of the first main address decoder 4231 through the cables MA0-MA4 The 5-bit third parallel address signal, the sub-address signal is the 4-bit fourth parallel address signal, the third parallel address signal and the fourth parallel address signal output by the first address decoder 4241 via the cables SA0-SA3 After being multiplied by the print data gate 4261, the total number of addresses that can be generated is the same as the original number, that is, M×N=5×4=20, which can solve the problem of increasing the chip layout size by setting 20 wiring lines in the known technology problem, and further reduce the area space of the liquid jet chip occupied by the wiring, so as to reduce the chip area, make the size of the liquid jet chip relatively smaller, and further reduce the cost of producing the liquid jet chip.

Please refer to the following table 1, which is the second parallel address signal input to the first main address decoder 4231 by the m0~m2 cable, and the second column address signal input to the first address decoder 4241 by the S0~S2 cable , the corresponding table corresponding to 20 addresses is solved:

Table I

Of course, the number of cables output by the first main address decoder 4231 and the first address decoder 4241 is not limited to M=5 and N=4, and can be adjusted as required. For example, when controlling the number of addresses When it is 16, the number of wiring of the first main address decoder 4231 can be M=4, while the first address decoder 4241 also maintains N=4, and after the two are multiplied, M×N=4×4=16 .

The main preheating control circuit 4262 of the utility model is mainly suitable for the liquid spraying chip 42 of the liquid spraying cartridge, and receives the power signal HV, the printing data signal PD, the preheating data signal PFD, the preheating control signal PF, and the reverse preheating control Signal PF-N, heating control signal MF, and reverse heating control signal MF-N are connected to the common terminal COM to preheat part of the liquid injection and the liquid injection chip, or to heat part of the liquid injection and generate bubbles , and then push the jet liquid out of a jet hole 228a of the jet chip.

Among them, the preheating control signal PF output in the preheating control inversion circuit 4265 and the reverse preheating control signal PF-N have an inverse relationship with each other, and the heating control signal MF output in the heating control inversion circuit 4264 It has an inverse relationship with the inverse heating control signal MF-N.

In some embodiments, the heating control inverting circuit 4264 and the preheating control inverting circuit 4265 may respectively include two inverters (not shown) to output control signals, that is, the preheating control inverting circuit 4265 may Reverse the input preheating control signal PF to reverse the output signal of the reverse preheating control signal PF-N, and the heating control reverse circuit 4264 can reverse the input heating control signal MF to reverse The outputs of the heating control signal MF-N are opposite output signals.

The driving transistor switch 4263 has a control terminal H, mainly through the control terminal H to control whether the heating resistor R is heated or preheated. When the control terminal H is a high potential signal (with a voltage signal), it will control the drive transistor switch 4263 to be turned on, and the heating resistor R will receive the power signal HV of the power supply terminal for heating or preheating, and the control terminal H is controlled by The main preheating control circuit 4262 controls.

As shown in Figure 10, the main preheating control circuit 4262 mainly includes a first switch M1, a second switch M2, a third switch M3, a fourth switch M4, a fifth switch M5, a sixth switch M6, and a seventh switch M7. , the eighth switch M8 , the ninth switch M9 and the tenth switch M10 , the first switch M1 to the tenth switch M10 may be MOS transistors.

The first switch M1 has an input end connected to the power signal, a control end H1 connected to the control end H of the drive transistor switch 4263 , and an output end H2 .

The second switch M2 has an input terminal connected to the power signal, an output terminal connected to the control terminal H of the driving transistor switch 4263 and the control terminal H1 of the first switch, and has a control terminal connected to the first switch. An output terminal H2 of the switch M1.

The third switch M3 has a control terminal connected to the heating control signal MF, has an input terminal connected to the output terminal H2 of the first switch M1 and the control terminal of the second switch circuit M2, and has an output terminal.

The fourth switch M4 has a control terminal connected to the print data signal PD, an input terminal connected to the output terminal of the third switch M3, and an output terminal connected to the common terminal COM (ground).

Wherein, the conduction of the fourth switch M4 and the third switch M3 can be respectively controlled by the print data signal PD and the heating control signal MF. When the print data signal PD and the heating control signal MF are high potential signals (with voltage signals), the third switch M3 and the fourth switch M4 are turned on, mainly controlling the control terminal of the second switch circuit M2 to trigger the drive transistor switch 4263 The control terminal H of the drive transistor switch 4263 is turned on, and at the same time, a power signal HV will be sent to the heating resistor R, so that the temperature of the heating resistor R will rise, so as to heat the spray liquid and generate bubbles, so that the spray liquid can be sprayed. onto inkjet media.

The fifth switch M5 has a control terminal connected to the preheating control signal PF, and has an input terminal connected to the input terminal of the third switch, the output terminal H2 of the first switch and the control terminal of the second switch circuit, and has an output terminal.

The sixth switch M6 has a control terminal connected to the preheating data signal PFD, an input terminal connected to the output terminal of the fifth switch M5, and an output terminal connected to the common terminal COM (ground). Therefore, whether the sixth switch M6 and the fifth switch M5 are turned on is respectively controlled by the preheating data signal PFD and the preheating control signal PF.

When the preheating data signal PFD and the preheating control signal PF are high potential signals (with voltage signals), the fifth switch M5 and the sixth switch M6 are turned on, mainly controlling the control terminal of the second switch circuit M2 to trigger the drive transistor The control terminal H of the switch 4263 prompts the drive transistor switch 4263 to be turned on, and at the same time transmits a power signal HV to the heating resistor R, so that the temperature of the heating resistor R will rise, so that part of the liquid injection and the liquid injection chip are preheated to a specific temperature.

The seventh switch M7 has a control terminal connected to the reverse heating control signal MF-N, and has an input terminal connected to the control terminal H1 of the first switch M1, the output terminal of the second switch M2 and the driving transistor switch The control terminal H of 4263 has an output terminal.

The eighth switch M8 has a control terminal connected to the print data signal PD, an input terminal connected to the output terminal of the seventh switch M7, and an output terminal connected to the common terminal COM (ground).

The seventh switch M7 and the eighth switch M8 are connected between the control terminal H of the drive transistor switch 4263 and the common terminal COM, and the seventh switch M7 and the eighth switch M8 are connected in series to respectively receive the reverse heating control signal MF-N and The print data signal PD mainly controls whether the seventh switch M7 and the eighth switch M8 are turned on or not by the reverse heating control signal MF-N and the print data signal PD. When the reverse heating control signal MF-N and the print data signal PD are high potential signals (with voltage signals), the seventh switch M7 and the eighth switch M8 are turned on, so that the driving transistor switch 4263 does not operate.

The ninth switch M9 has a control terminal connected to the reverse preheating control signal PF-N, and has an input terminal connected to the input terminal of the seventh switch M7, the control terminal H1 of the first switch M1, the second The output terminal of the switch M2 and the control terminal H of the driving transistor switch 4263 have an output terminal.

The tenth switch M10 has a control terminal connected to the preheating data signal PFD, an input terminal connected to the output terminal of the ninth switch M9, and an output terminal connected to the common terminal COM (ground).

The ninth switch M9 and the tenth switch M10 are also connected between the control terminal H of the drive transistor switch 4263 and the common terminal COM, and the ninth switch M9 and the tenth switch M10 are connected in series to respectively receive the reverse preheating control signal PF-N and the preheating control signal PF-N. The thermal data signal PFD mainly controls whether the ninth switch M9 and the tenth switch M10 are turned on or not by the reverse preheating control signal PF-N and the preheating data signal PFD. When the preheating data signal PFD and the reverse preheating control signal PF-N are high potential signals (with voltage signals), the ninth switch M9 and the tenth switch M10 are turned on, so that the driving transistor switch 4263 does not operate.

When the inkjet control circuit 41 intends to execute the inkjet action, it will transmit the power signal HV, the print data signal PD, the preheat data signal PFD, the preheat control signal PF, the reverse preheat control signal PF-N, the heating control The signal MF and the reverse heating control signal MF-N are used to control the heating resistor R for heating or preheating.

The preheating data signal PFD of the sixth switch M6 in the above embodiment can be turned on all the time, but in this way all the heating resistors R are kept in continuous preheating, so that the entire liquid spraying chip 42 will accumulate a relatively high temperature, which will affect the spraying. The execution efficiency of the liquid chip 42 may even cause the heating resistor R of the liquid spray chip 42 to burn out and fail to work.

From the above description, this embodiment will improve the above-mentioned deficiency, so the best mode of this embodiment is to design the timing signal of the address signal An corresponding to the print data signal PD, and design the preheating data signal PFD as a corresponding address The timing signal of the signal An-1, so that the address signal An cooperates with different printing data signals Data0, Data1, Data2, ..., Data14, etc. to generate the printing data signal PD and preheating through the printing data gate 4261 and the preheating data gate 4260 The data signal PFD, such as the printing data signal Data1 and the address signal A2 generates an output signal D1A2 through the printing data gate 4261 , and the preheating data signal A1 generates an output signal A1 through the preheating data gate 4260 . That is, when the heating resistor R performs heating operation, the address signal corresponding to the heating resistor R is An, that is, the heating operation is controlled by the print data signal PD and the heating control signal MF, and the heating resistor R wants to perform a preheating operation, then The preheating operation is controlled by the preheating control signal PF and the preheating data signal PFD. Therefore, the corresponding address signal received by the heating resistor R that intends to implement the heating operation is An, and the corresponding address signal received by the heating resistor R that intends to implement the preheating operation is An-1, so only the heating resistor for the pre-heating operation R implements the preheating operation first, without other heating resistors R performing preheating operation together, so that all the heating resistors R will not keep warming up all the time, avoiding the accumulation of a relatively high temperature in the entire liquid jet chip 42, resulting in an impact The execution efficiency of the liquid jet chip 42 or more serious causes the heating resistor R of the liquid jet chip 42 to burn out and fail to work.

In other words, when the print data signal PD is a high potential signal (with a voltage signal), the voltage signal of the control terminal H of the drive transistor switch 4263 is controlled by the heating control signal MF to control the heating of the heating resistor R.

When the preheating data signal PFD is a high potential signal (with a voltage signal), the voltage signal of the control terminal H of the driving transistor switch 4263 is controlled by the preheating control signal PF to control the heating resistor R to preheat.

Therefore, when the inkjet control circuit 41 performs the inkjet operation, if the print data signal PD and the heating control signal MF are high potential signals (with voltage signals), and the corresponding address signal received by the print data signal PD is An, then The main preheating control circuit 4262 will use the heating control signal MF to make the heating resistor R heat part of the spray liquid to generate bubbles, and then push the spray liquid out of the liquid spray hole 228a of the liquid spray chip.

If there is no print data signal PD is a low potential signal (no voltage signal), then the preheating data signal PFD and the preheating control signal PF are high potential signals (with a voltage signal), and the corresponding signal received by the preheating data signal PFD The address signal is An-1, so the main preheating control circuit 4262 controls the heating resistor R to preheat part of the liquid spray and the liquid spray box by the preheat control signal PF.

When the liquid jet printing is completed, the heating control signal MF becomes a low potential signal (no voltage signal), which is a high potential signal (with a voltage signal) relative to the reverse heating control signal MF-N, while the print data signal PD is still Continue to be a high potential signal (with a voltage signal), and the corresponding address signal received by the print data signal PD is An, so the seventh switch M7 and the eighth switch M8 will be turned on and operated, while the other switches are not turned on. The potential of the control terminal H1 of the first switch M1 and the control terminal H of the drive transistor switch 4263 is pulled down to a low potential signal (no voltage signal) by the seventh switch M7 and the eighth switch M8, so that the heating resistor R stops heating.

And when the print data signal PD is a low potential signal (no voltage signal), and the preheating data signal PFD and the preheating control signal PF are high potential signals (with a voltage signal), and the corresponding signal received by the preheating data signal PFD The address signal is An-1, the fifth switch M5 and the sixth switch M6 will be turned on and operated, and the other switches will not be turned on, and the potential of the control terminal H of the driving transistor switch 4263 can be triggered by the second switch M2 to be a high potential signal ( have a voltage signal), and transmit the power signal to the heating resistor R, so that the heating resistor R preheats part of the liquid spraying and liquid spraying chips.

When the preheating is completed, when the preheating control signal PF is a low potential signal (no voltage signal), relative to the reverse preheating control signal PF-N is a high potential signal (with a voltage signal), while the preheating data signal PFD is still To continue to be a high-potential signal (with a voltage signal), and the corresponding address signal received by the preheating data signal PFD is An-1, so that the ninth switch M9 and the tenth switch M10 are turned on and operated, and the other switches are not turned on. The ninth switch M9 and the tenth switch M10 pull down the control terminal H1 of the first switch M1 and the control terminal H of the drive transistor switch 4263 to a low potential signal (no voltage signal), so that the heating resistor R stops preheating.

According to the idea of the present utility model, the control signals of the inkjet control circuit 41, that is, the printing data signal PD, the preheating data signal PFD, the heating control signal MF and the voltage level of the preheating control signal PF will vary according to different printer models. It is different, and the preheating sequence of the heating resistor R is that the print data signal and the corresponding address signal An (for example, A2) will only be input to the print data gate 4261, and the output print data signal is PD, and the address signal is An at the same time. -1 (such as A1) will only be input to the preheating data gate 4260 to generate and output the preheating data signal PFD. That is, the preheating data signal PFD and the corresponding address signal A1 (An-1) before the address signal A2 (An) can be correspondingly input into the main preheating control circuit 4262 to prompt the heating resistor R to preheat .

In some embodiments, the voltage of the control signal is about 3.3 volts to save power and improve efficiency. Similarly, the driving transistor switch 4263 of the present invention is triggered by the second switch M2 and transmits the power signal to the control terminal H of the driving transistor switch 4263, and then uses the power signal to control the driving transistor switch 4263 to conduct, so the utility model The driving transistor switch 4263 can be controlled by a control signal with a smaller voltage, thereby making the control method more effective and convenient.

To sum up, the structure of the liquid spray box of the present invention mainly uses the staggered arrangement to set more heating resistors on the chip to effectively use the space of the liquid spray box to reduce the cost and increase the printing speed. The primary address decoder and the secondary address decoder are used to replace the known single address decoder, reducing the wiring area of the liquid jet chip to reduce the chip area, so that the size of the liquid jet chip is relatively reduced, thereby reducing the cost of producing inkjet printers .

Therefore, the liquid spray box structure of the present utility model has great industrial value, and an application is filed according to law.

The utility model can be modified in various ways by the people who are familiar with this technology, but all do not break away from the intended protection of the appended patent scope.

Claims (23)

1. A liquid jet cartridge structure for inkjet printing of at least one liquid, comprising a jet printing chip and a heating resistor arranged on the liquid jet chip and at least one axis array extending longitudinally, characterized in that : The length of the jet printing chip is between 15.1 mm and 15.7 mm, the width of the jet printing chip is between 5.8 mm and 6.2 mm, and the aspect ratio of the jet printing chip is 2.4 to 2.7 times. 2. The liquid spray box structure according to claim 1, wherein the length of the jet printing chip is 15.4 mm. 3. The liquid spray box structure according to claim 1, wherein the width of the jet printing chip is 6 mm. 4. The liquid spray box structure according to claim 1, wherein the aspect ratio of the jet printing chip is 2.5 times. 5 . The liquid spray box structure according to claim 1 , wherein the heating resistors of each axis array of the jet printing chip are arranged in at least two axis groups along axes parallel to each other and spaced apart from each other. 6 . 6 . The liquid spray box structure according to claim 1 , wherein the jet printing chip has a total of 4 axis array heating resistors arranged in 8 axis groups along axes parallel to each other and spaced apart from each other. 6 . 7 . The liquid spray box structure according to claim 6 , wherein each axis group of the jet printing chip has 300 heating resistors, and all the heating resistors of the jet printing chip have a total of 2400 heating resistors. 8 . The liquid spray box structure according to claim 1 or 7 , wherein the heating resistors of the jet printing chip are disposed thereon at a density of 24.6 to 27.4 pieces per square millimeter. 9 . The liquid spray box structure according to claim 8 , wherein the density of the heating resistors for printing the chip is set on it at a density of 25.9 per square millimeter. 10 . The liquid spray box structure as claimed in claim 7 , wherein the total length of the 300 heating resistors included in each axis group is 0.5 inches. 11 . 11. The liquid spray box structure according to claim 7, wherein the distance between two adjacent heating resistors in the same axis group is 1/600 inch. 12. The liquid spray box structure according to claim 1, characterized in that, the liquid spray box structure further comprises at least one liquid supply tank, which is respectively arranged in the at least 2 axis groups of the heating resistors of each axis array between. 13. The liquid spray box structure according to claim 12, wherein the width of each liquid supply groove is 0.3 mm, and the length is 12.8 mm. 14. The liquid spray box structure according to claim 12, wherein the distance between two adjacent liquid supply grooves is 1.27 mm. 15 . The liquid spray box structure according to claim 13 , wherein the width of the jet printing chip is 6 mm, and the ratio of the total width of the liquid supply tank to the cross-sectional area of the jet printing chip is 20%. 16. The liquid jet box structure according to claim 1, wherein the liquid jet box structure implements a printing module of a rapid prototyping device, and the printing module includes: A spray printing platform has a frame body and a transmission shaft, and the transmission shaft straddles the frame body; a bearing seat, which is passed through the transmission shaft; and At least two identical modular liquid spray boxes are correspondingly arranged on the bearing seat, wherein the liquid spray box has a box body, and the box body is provided with three liquid storage chambers for accommodating different printing liquids respectively , and the cassette body of the at least two identical modular liquid spraying cassettes contains at least one identical printing liquid, so as to implement rapid prototyping printing operations. 17. The liquid spray box structure according to claim 16, wherein the printing liquid contained in one of the liquid storage chambers is a binder, and the different spraying liquids contained in the other two liquid storage chambers are The printing liquid is pigment ink. 18. The structure of the liquid spray box according to claim 16, wherein the liquid spray box is further provided with an identification chip for identifying and monitoring the spray printing box and communicating electrical signals with the rapid prototyping device. 19. The liquid spray box structure as claimed in claim 1, characterized in that, comprising: An inkjet control circuit, receiving several strobe signals, several clock signals, a data signal, an address signal, a heating control signal, a preheating control signal, and a power supply signal, including: A data signal converter, which receives a series of data signals and converts them into several parallel data signals for output; An address signal converter, which receives a serial address signal and converts it into several first parallel address signals and several second parallel address signals for output; a master address decoder, connected to the address signal converter, for decoding the first parallel address signals into third parallel address signals; A primary address decoder, connected to the address signal converter, for decoding the second parallel address signals into fourth parallel address signals; A buffer, receiving a heating signal and a preheating signal, used to remove the noise of the heating signal and the preheating signal and process the stable output; and A plurality of inkjet drive circuits, each inkjet drive circuit includes: A main preheating control circuit; a print data gate, receiving one of the third parallel address signals of the main address decoder, one of the fourth parallel address signals of the sub-address decoder and one of the parallel data signals of the data signal converter, outputting a print data signal for performing a logic operation, and connecting it to the main preheating control circuit; A preheating data gate, receiving one of the third parallel address signals of the main address decoder and one of the fourth parallel address signals of the sub-address decoder to perform logic operations and output a preheating data signal to connect input into the main preheating control circuit; A heating control reverse circuit, receiving and inputting the heating control signal to output a heating control signal or a reverse heating control signal to the main preheating control circuit; A preheating control reverse circuit, receiving and inputting the preheating control signal to output a preheating control signal or a reversed preheating control signal to the main preheating control circuit; A drive transistor switch, with a control terminal connected to the main preheating control circuit, and with an input terminal and an output terminal, and the output terminal is connected to ground; and a heating resistor, receiving a power signal, and connected to the drive An input end of the transistor switch is connected. 20. The liquid jet cartridge structure according to claim 19, wherein the main preheating control circuit of the inkjet drive circuit comprises: A first switch has an input terminal connected to the power signal, a control terminal connected to the control terminal of the drive transistor switch, and an output terminal; A second switch has an input end connected to the power signal, an output end connected to the control end of the drive transistor switch and the control end of the first switch, and a control end connected to the first switch output terminal; A third switch has a control terminal connected to the heating control signal, has an input terminal connected to the output terminal of the first switch and the control terminal of the second switch circuit, and has an output terminal; A fourth switch has a control terminal connected to the print data signal, an input terminal connected to the output terminal of the third switch, and an output terminal connected to ground; A fifth switch has a control terminal connected to the preheating control signal, has an input terminal connected to the input terminal of the third switch, the output terminal of the first switch and the control terminal of the second switch circuit, and has an output terminal; A sixth switch has a control terminal connected to the preheating data signal, an input terminal connected to the output terminal of the fifth switch, and an output terminal connected to ground; A seventh switch has a control terminal connected to the reverse heating control signal, has an input terminal connected to the control terminal of the first switch, the output terminal of the second switch and the control terminal of the drive transistor switch, and has an output terminal; An eighth switch, having a control terminal connected to the print data signal, having an input terminal connected to the output terminal of the seventh switch, and having an output terminal connected to ground; A ninth switch, having a control terminal connected to the reverse preheating control signal, having an input terminal connected to the input terminal of the seventh switch, the control terminal of the first switch, the output terminal of the second switch and the driving the control end of the transistor switch, and having an output end; A tenth switch has a control terminal connected to the preheating control signal, an input terminal connected to the output terminal of the ninth switch, and an output terminal connected to ground. 21. The liquid jet cartridge structure according to claim 20, characterized in that, when the main preheating control circuit of the inkjet drive circuit outputs a high potential signal from the print data gate and the preheat data gate, the print data The signal is input to the fourth switch, the preheating data signal is input to the sixth switch, and the fifth switch selects to receive the preheating control signal to turn on the second switch to trigger the conduction of the drive transistor switch, prompting the heating resistor to preheat action. 22. The liquid ejection cartridge structure according to claim 20, wherein the main preheating control circuit of the inkjet drive circuit is a high potential signal output by the print data gate, and the preheat data gate is not When the voltage signal is output, the printing data signal is input to the fourth switch, and the third switch selects to receive the heating control signal, so that the first switch is used to trigger the switch of the driving transistor to turn on, prompting the heating resistor to heat the inkjet printing action. 23. The liquid jet cartridge structure according to claim 21 or 22, characterized in that, the fourth switch and the eighth switch are selected to receive a print data signal, and the required corresponding address signal is the timing of An, and the first The sixth switch and the tenth switch are selected to receive a preheating data signal, and the required corresponding address signal is the timing of An-1.