JP6089869B2 - Droplet discharge device - Google Patents

Description

  The present invention relates to a droplet discharge apparatus such as an ink jet recording apparatus.

  At present, it is strongly demanded to increase the printing speed in a droplet discharge apparatus, for example, an ink jet recording apparatus. One way to achieve this is to increase the number of nozzles that eject droplets. In the electrical system, the number of signal lines for supplying power and inputting drive signals increases as the number of wiring boards that transmit drive signals to the ejection head is increased or increased.

  By the way, the output terminal of the wiring board is connected to the input terminal arranged on one side of the wiring board in the ink jet recording apparatus (see, for example, Patent Document 1).

JP 2010-115918 A

  In the technique described in Patent Document 1, since it is connected only to one side of the wiring board, if the number of signal lines is increased as described above, the arrangement pitch of the output terminals and input terminals becomes a narrow pitch, which causes a problem such as a short circuit. Will occur.

  In the present invention, the connection portion between the first wiring board and the second wiring board constituting the wiring path for transmitting the driving signal is divided into two portions, thereby avoiding the arrangement pitch becoming a narrow pitch, short-circuiting, etc. An object of the present invention is to provide a droplet discharge device that solves the above problem.

  According to a first aspect of the present invention, there is provided an ejection head for ejecting liquid droplets, a control board for outputting a drive signal for ejecting liquid droplets from the ejection head, the control board and the ejection head connected to each other, and the drive signal A wiring path that transmits the control circuit board to the ejection head, the wiring path facing the terminal surface and a first wiring board having a terminal surface on which first and second input terminal portions are formed. And having a facing surface on which the first and second output terminal portions joined to the first and second input terminal portions are formed and aligned with the first wiring board in an orthogonal direction perpendicular to the terminal surface. A flexible second wiring board disposed and connected in the order of the control board, the second wiring board, the first wiring board, and the ejection head, wherein the second wiring board is an input Part, and the input part and the first and second output terminal parts are connected. A plurality of wirings extending in a first direction, wherein the second output terminal portion is disposed between the input portion and the first output terminal portion in the first direction, and the first input terminal The portion and the second input terminal portion are arranged with an interval in the first direction. Here, “junction” means that they are physically coupled, and “connection” means that they are electrically coupled. In “connection”, those that are in direct contact and those that are physically separated Including. The “drive signal” is a serial-in data signal or the like.

  In this way, the connection portion between the input terminal portion of the first wiring board and the output terminal portion of the second wiring board is divided into two places spaced in the first direction. This is advantageous in avoiding the occurrence of a short circuit and the like by avoiding the terminal arrangement pitch from becoming a narrow pitch. In addition, the increase in print data due to the increase in the number of nozzles may lead to malfunctions by increasing the data transfer frequency and facilitating noise.However, as described above, the pinch pitch can be avoided, resulting in malfunctions. The possibility of being connected can be reduced.

  According to a second aspect of the present invention, in the liquid droplet ejection device according to the first aspect, the liquid ejection apparatus further includes a third wiring board bonded to the ejection head and the first wiring board, It has an output part joined to a wiring board, and the output part can be configured to be arranged between the first input terminal part and the second input terminal part in the first direction.

  According to this configuration, since the output unit is arranged between the first input terminal unit and the second input terminal unit in the first direction, the discharge head and the first wiring board are connected using the output unit. The third wiring board to be connected can be directly bonded to the first wiring board.

  3. The liquid droplet ejection apparatus according to claim 1, wherein a distance between the control board in the first direction and the first input terminal portion is the distance between the control board in the first direction. The wiring path is larger than the distance of the second input terminal portion, and the wiring path connects a power source for driving the discharge head and a constant potential ground to the discharge head, and the first input terminal portion is It is preferable that the second input terminal unit includes a unit for transmitting the drive signal, including a unit connected to a power source and a ground.

  In this way, since the second input terminal portion including the one for transmitting the drive signal and the first input terminal portion including the one connected to the power source and the ground are separated, the first input terminal is particularly provided. It is possible to secure an arrangement space for the wiring connected to the section, and to reduce the impedance of the wiring. In addition, the wiring for transmitting the drive signal is connected to the second input terminal portion so that the wiring length is shorter than that connected to the first input terminal portion. Therefore, it is difficult for noise to be applied to the drive signal, and the possibility of causing malfunction is reduced.

  By the way, since the wiring connected from the input unit to the second input terminal unit is shorter than the wiring connected from the input unit to the first input terminal unit, the impedance of the wiring is small. In the case of a discharge head that discharges black, yellow, cyan, and magenta droplets, the black and magenta droplets have darker colors than the yellow and cyan droplets, so the dot size has changed. It is easy for the user to notice. Therefore, the drive signal for causing the droplet ejection head to eject black and magenta droplets can be made less susceptible to noise by being connected to the second input terminal portion where the impedance of the wiring is small.

  Therefore, when the ejection head is configured to eject black, yellow, cyan, and magenta droplets, the second input terminal unit may eject black and magenta droplets. It is desirable to include a drive signal for discharging the droplet discharge head.

  According to a fifth aspect of the present invention, in the liquid droplet ejection apparatus according to any one of the first to fourth aspects, the first wiring board has a dummy connection terminal portion that does not connect the control board and the ejection head. And the plurality of wirings of the second wiring board include a driving signal wiring for transmitting the driving signal and a ground wiring connected to the ground, and the ground wiring includes at least two wirings. And arranged on both sides of the drive signal wiring in a width direction parallel to the terminal surface and perpendicular to the first direction, and the ground wiring is halfway through the first wiring board. A dummy terminal portion connected to the dummy connection terminal portion is provided, and a connection portion between the dummy terminal portion and the dummy connection terminal portion is connected to a connection portion between the first input terminal portion and the first output terminal portion. The first one Are shifted in, it is desirable.

  In this way, the impedance of the ground wiring can be reduced, and the connection portion between the dummy terminal portion and the dummy connection terminal portion is connected to the connection portion between the first input terminal portion and the first output terminal portion. Since the displacement is in the first direction, the connection portion between the first input terminal portion and the first output terminal portion is prevented from being peeled off simultaneously when the connection portion between the dummy terminal portion and the dummy connection terminal portion is peeled off. Can do.

  The liquid droplet ejection device according to any one of claims 1 to 5, further comprising a liquid flow path for supplying a liquid to the ejection head. The second wiring board is disposed so as to sandwich the first wiring board in the orthogonal direction, and the first wiring board has a first through hole between the first input terminal portion and the second input terminal portion. The second wiring board has a second through hole between the first output terminal portion and the second output terminal portion, and the liquid flow path passes through the first and second through holes. The second wiring board includes an overlapping portion that is bent and overlaps in the orthogonal direction between the first output terminal portion and the second output terminal portion, and the overlapping portion includes It is desirable that a second through hole is provided.

  In this way, an overlapping portion is provided on the second wiring board, and the flow of the signal is reversed in that portion so that the radiation noises cancel each other out. .

  According to a seventh aspect of the present invention, in the droplet discharge device according to the sixth aspect, the liquid channel includes first and second liquid channels arranged side by side in the first direction, and the first The liquid flow path is disposed closer to the first input terminal portion than the second liquid flow path in the first direction, and the second wiring board is bent and not overlapped with the planar portion. A second through hole corresponding to the first through hole is provided in the planar portion, and the overlapping portion is disposed closer to the first input terminal portion than the planar portion in the first direction. The first liquid flow path passes through the second through hole of the overlapping portion, and the second liquid flow path passes through the second through hole of the planar portion corresponding to the first through hole. Is desirable.

  In this way, by providing an overlapping portion on the second wiring board, the signal flow is reversed, and the radiation noise is canceled out, so that it is difficult for the signal to get over the noise.

  According to a eighth aspect of the present invention, in the droplet discharge device according to the sixth or seventh aspect, the second through hole of the overlapping portion is parallel to the terminal surface and from the width direction orthogonal to the first direction. It is desirable that the long hole is long in the first direction.

  In this way, the second wiring board is bent at the overlapping portion, but the tolerance of deformation of the second wiring board can be increased by making the second through hole an elongated hole.

  9. The liquid droplet ejection apparatus according to claim 7, wherein the first liquid channel is inclined with respect to a virtual axis parallel to the orthogonal direction, and the first liquid It is desirable that the channel has an inclination angle with respect to the virtual axis larger than that of the second liquid channel. Here, the second liquid channel includes both of those that are not inclined and those that are inclined. That is, the inclination angle of the second liquid channel includes 0 degree.

  In this way, the second wiring board is bent in the overlapping portion, but the first liquid flow path passing through the second through hole in the overlapping portion is inclined with respect to the virtual axis, so that the deformation of the overlapping portion is not caused. The tolerance can be increased.

  As described in claim 10, in the droplet discharge device according to any one of claims 7 to 9, the first liquid channel has a larger channel cross-sectional area than the second liquid channel. Is desirable.

  In this way, even if the inclination angle of the first liquid channel is large, the channel cross-sectional area is increased, so that an increase in channel resistance due to the tilting can be reduced.

  In the present invention, the connection portion between the input terminal portion of the first wiring board and the output terminal portion of the second wiring board is divided into two portions spaced apart in the first direction. It is possible to avoid the arrangement pitch from becoming a narrow pitch, and it is possible to prevent problems such as a short circuit from occurring. In addition, the increase in print data due to the increase in the number of nozzles may lead to malfunctions by increasing the data transfer frequency and facilitating noise.However, as described above, the pinch pitch can be avoided, resulting in malfunctions. The possibility of being connected can be reduced.

1 is a schematic configuration diagram of an ink jet recording apparatus that is Embodiment 1 of a droplet discharge apparatus according to the present invention. It is explanatory drawing which shows the relationship between the control board in the said apparatus, the 1st-3rd wiring board, and the discharge head. It is a schematic plan view of the first wiring board. It is a schematic plan view of the second wiring board. FIG. 3 is a diagram similar to FIG. 2 for the second embodiment. It is a top view about the 2nd wiring board of the said Embodiment 2. FIG. It is a top view about another example about the 2nd wiring board of the embodiment 2. It is a figure similar to FIG. 2 about Embodiment 3. FIG. It is a figure similar to FIG. 2 about a modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1 is a schematic configuration diagram of an ink jet recording apparatus which is an embodiment of a droplet discharge apparatus according to the present invention.

  As shown in FIG. 1, the ink jet recording apparatus 1 includes a carriage 3 that reciprocates in a third direction S3 (scanning direction) along the guide rod 2, and ink droplets (black, yellow) attached to the lower surface of the carriage 3. , Cyan and magenta droplets). In this recording apparatus 1, the nozzles of the recording head 4 reciprocally move in the third direction S3 together with the carriage 3 toward the recording paper P conveyed in the first direction S1 (paper feeding direction) orthogonal to the third direction S3. By ejecting ink downward in the two directions S2, images, characters, and the like are recorded on the recording paper P. Further, the recording paper P on which images, characters, and the like are recorded is discharged by the transport roller 5 in the first direction S1.

  For example, as shown in FIG. 2, a drive signal for discharging droplets from the discharge head 4 below the carriage 3 is sent from a relay board 11 that relays a signal from the control board 9 on the main body 1A (see FIG. 1) side. The output is transmitted to the ejection head 4 through the wiring path 12 connecting the relay substrate 11 and the ejection head 4. The driving signal is transmitted from the control board 9 to the relay board 11 through the connector 11A. 11B is a capacitor.

  Specifically, the wiring path 12 includes a first wiring board 14 having a terminal surface 14A on which the first and second input terminal portions 14a and 14b are formed, and a facing surface 15A facing the terminal surface 14A. And a second wiring board 15 arranged side by side with the first wiring board 14 in a second direction S2 orthogonal to the terminal surface 14A. First and second output terminal portions 15a and 15b joined to the first and second input terminal portions 14a and 14b are formed on the facing surface 15A. The first wiring board 14 is formed of a hard board. The first wiring board 14 may be a flexible board.

  The second wiring board 15 is a flexible wiring board having flexibility, and the second wiring board 15 and the ejection head 4 are arranged so as to sandwich the first wiring board 14 in the second direction S2. .

  The relay substrate 11, the second wiring substrate 15, the first wiring substrate 14, and the ejection head 4 are connected in this order. The carriage 3 has a holding frame 13, and the ejection head 4 and the first wiring board 14 are supported by the holding frame 13 so as to be separated from each other, and constitute a lower part of the carriage 3. The ejection head 4 is positioned on the lower surface of the carriage 3 by being attached to the holding frame 13.

  The carriage 3 further includes a liquid flow path 21 for supplying the liquid from the liquid damper 20 that stores liquid (ink) to the ejection head 4. The liquid damper 20 is provided in the middle of the liquid flow path between the ink cartridge (not shown) and the ejection head 4, and temporarily stores the liquid supplied from the ink cartridge. The liquid damper 20 and the ink cartridge are connected by a tube (not shown). The liquid passage 21 includes first and second liquid flow paths 21A and 21B, which are arranged side by side in the first direction S1. The first liquid channel 21A is disposed closer to the first input terminal portion 14a than the second liquid channel 21B in the first direction S1.

  In addition to the first and second input terminal portions 14a and 14b, the first wiring substrate 14 includes an output portion 14c to which the third wiring substrate 22 is joined between the first and second input terminal portions 14a and 14b. Provided (see FIG. 3). The first input terminal portion 14a and the output portion 14c are connected by a plurality of wirings 14e extending in the first direction S1, and the second input terminal portion 14b and the output portion 14c extend in the first direction S1. They are connected by a plurality of existing wires 14f. The third wiring board 22 connects the ejection head 4 and the first wiring board 14, and a driving IC 22 </ b> A that functions as a switching element when the ejection head 4 is driven is mounted. The output unit 14c is disposed between the first input terminal unit 14a and the second input terminal unit 14b in the first direction S1. The first wiring board 14 has a first through hole 14B through which the first and second liquid flow paths 21A and 21B pass between the first input terminal portion 14a and the second input terminal portion 14b in the first direction S1. , 14C are formed.

  On the other hand, as shown in FIG. 4, in addition to the first and second output terminal portions 15a and 15b, the second wiring board 15 includes an input portion 15c, an input portion 15c, and first and second output terminal portions 15a, 15b, and a plurality of wirings 15da to 15dd extending in the first direction S1. In the second wiring board 15, the second output terminal portion 15b is disposed between the input portion 15c and the first output terminal portion 15a in the first direction S1. Corresponding to these output terminal portions 15a and 15b, on the first wiring board 14, the first input terminal portion 14a and the second input terminal portion 14b are arranged with an interval in the first direction S1. The second wiring board 15 has a second through hole 15B through which the first and second liquid flow paths 21A and 21B pass between the first output terminal portion 15a and the second output terminal portion 15b in the first direction S1. , 15C are formed.

  The first and second liquid flow paths 21A and 21B are connected to the ejection head 4 through the first and second through holes 14B, 14C, 15B, and 15C.

  The wiring path 12 connects a power source for driving the ejection head 4 and a ground having a constant potential to the ejection head 4. The second input terminal portion 14 b on the side close to the relay substrate 11 is connected to the ejection head 4. The first input terminal portion 14a on the side farther from the relay substrate 11 includes the one connected to the power source and the ground. . That is, the transmission path (wiring length) of the drive signal is made shorter than the transmission path of the power source and the constant potential ground to reduce the influence of noise.

  By the way, if the 2nd input terminal part 14b is arrange | positioned in the whole width | variety of the 2nd wiring board 15 along 3rd direction S3 orthogonal to 1st direction S1, the input part 15c and the 1st input terminal part 15a will be connected. The wiring to be performed cannot be placed. For this reason, the second input terminal portion 15 b is disposed only in the central portion in the width direction (third direction) of the second wiring board 15. As a result, the number of second input terminal portions 14b is smaller than the total number of the plurality of wirings 15da to 15dd. Therefore, some of the plurality of wirings 15da to 15dd are connected to the first input terminal portion 14a. As a result, the wiring 15da has a shorter length and a lower impedance than the wirings 15db to 15dd.

  Since the black droplet and the magenta droplet are darker than the yellow droplet and the cyan droplet, the user can easily notice a change in the dot diameter. For this reason, it is preferable that all of the wiring for driving signals for discharging black droplets and magenta droplets (hereinafter referred to as wiring for black droplets and magenta droplets) be connected to the first input terminal portion 15a. . However, when the number of nozzles of the ejection head 4 is increased, the number of black droplets and magenta droplets is larger than the number of second input terminal portions 14b. Therefore, a part of the wiring for the black droplet and the magenta droplet is connected to the second input terminal portion 14b, and the other portions are connected to the first input terminal portion 14a. Further, wiring for driving signals for discharging yellow droplets and cyan droplets (hereinafter referred to as wiring for yellow droplets and cyan droplets) is connected to the first input terminal portion 14a.

  Since the second wiring board 15 has through holes 15B and 15C through which the liquid passage 21 (first and second liquid passages 21A and 21B) passes, the wiring 15db disposed in the central portion is formed. Is narrower than the line widths of the wirings 15 dc and 15 dd provided at the end portions on both sides of the central portion.

  For this reason, when the number of nozzles increases, there is a difference in image quality between printing by the wiring driving signal at the central portion and printing by the wiring driving signal at the end portion. In other words, since there is a possibility that the image quality of the printing by the driving signal by the wiring in the central portion may be inferior, the wiring 15db in the central portion is used for driving signals for discharging yellow droplets and cyan droplets in which the difference in image quality is not noticeable. Is included. The end portion wiring 15dc includes a drive signal for discharging black droplets and magenta droplets.

  According to this configuration, the wiring for the black droplet and the magenta droplet has a smaller wiring impedance than the wiring for the yellow droplet and the cyan droplet. For this reason, black droplets and magenta droplets cause noise in the drive signal due to radiation noise, and ejection disturbance due to changes in ejection speed and ejection amount is less likely to occur than yellow droplets and cyan droplets. In addition, since yellow and cyan droplets are lighter than black and magenta droplets, it is difficult for the user to notice that the size of the dots has changed. As a result, image quality degradation is less noticeable.

  Further, the first wiring board 14 has a dummy connection terminal portion 14 d that does not connect the relay board 11 and the ejection head 4. The dummy connection terminal portion 14d is a terminal formed on the first wiring board 14, and is not particularly connected to a wiring or the like that is electrically connected to the ejection head 4.

  On the other hand, the plurality of wirings 15da to 15dd of the second wiring board 15 include a driving signal wiring 15da and 15db for transmitting a driving signal, a ground wiring 15dc connected to the ground, and a power supply wiring 15dd. Including. The ground wiring 15dc is composed of at least two lines, and is arranged on both sides of the drive signal wirings 15da and 15db in the third direction S3 in parallel with the terminal surface 14A. A dummy terminal portion 15e connected to the dummy connection terminal portion 14d of the first wiring board 14 is provided. The connection parts of these dummy terminal parts 14d and 15e are shifted in the first direction S1 with respect to the connection parts of the first input terminal part 14a and the first output terminal part 15a. Thereby, even if the connection part with dummy terminal part 14d, 15e peels, the peeling does not affect the connection part of the 1st input terminal part 14a and the 1st output terminal part 15a.

  According to the apparatus 1, the connection portion between the first input terminal portion 14 a of the first wiring substrate 14 and the first output terminal portion 15 a of the second wiring substrate 15, and the second input terminal portion 14 b of the first wiring substrate 14. And the connection portion between the second wiring board 15 and the second output terminal portion 15b are divided into two places spaced apart in the first direction S1, so that the arrangement pitch of the input terminals and the output terminals becomes a narrow pitch. This is advantageous in avoiding such problems and preventing problems such as short circuits from occurring. In addition, an increase in print data due to an increase in the number of nozzles may lead to a malfunction due to an increase in data transfer frequency and noise, which may lead to malfunctions. The possibility of being connected can be reduced.

In particular, the drive signal is transmitted from the relay board 11 by dividing it into a second input terminal portion 14b including one for transmitting a drive signal and a first input terminal portion 14a including one connected to a power source and a ground. Since the distance (wiring length) to be reduced is reduced, the possibility that noise is applied to a drive signal that greatly affects the operation of the apparatus and leads to a malfunction can be reduced.
(Embodiment 2)
As shown in FIGS. 5 and 6, the second wiring board 15 ′ is bent between the first output terminal portion 15a and the second output terminal portion 15b and an overlapping portion 15f that is bent and overlaps the S2. The flat part 15g which does not overlap is provided, the 1st through-hole 15C is provided in the flat part 15g, and the 1st through-hole 15B is provided in the overlapping part 15f.

  The overlapping portion 15f is disposed closer to the first input terminal portion 14a than the planar portion 15g in the first direction S1, and the first liquid flow path 21A passes through the first through hole 15B of the overlapping portion 15f and is second The liquid flow path 21B passes through the second through hole 15C of the planar portion 15g.

  In the second wiring board 15 ', three first through holes 15B through which the first liquid passage 21A passes are provided according to the shape of the overlapping portion 15f.

  As described above, since the overlapping portion 15f is provided on the second wiring substrate 15 'near the first input terminal portion 14a where the transmission distance from the relay substrate 11 becomes long, the signal flow is reversed in the portion 15f. Radiation noises cancel each other, making it difficult for noise to ride on signals.

In that case, as shown in FIG. 7, the first through hole provided in the overlapping portion 15f may be a long hole 15B ′ that is parallel to the terminal surface 15A and longer in the first direction S1 than in the third direction S3. Thereby, the tolerance of the deformation | transformation of 2nd wiring board 15 'bent so that it may become the overlapping part 15f can be raised by making the 2nd through-hole of the overlapping part 15f into the long hole 15B'.
(Embodiment 3)
As shown in FIG. 8, the first liquid channel 21A ′ can be inclined with respect to a virtual axis S4 parallel to the third direction S3 orthogonal to the first direction S1. In this case, the first liquid channel 21A ′ has an inclination angle with respect to the virtual axis S4 larger than that of the second liquid channel 21B. Thereby, since the first liquid channel 21A ′ passing through the first through hole 15B ″ in the overlapping portion is inclined with respect to the virtual axis S4, the tolerance of deformation of the overlapping portion can be increased.

  Since the first liquid channel 21A ′ is inclined, the channel resistance tends to increase. However, the first liquid channel 21A has a larger channel cross-sectional area than the second liquid channel 21B. It is also possible to reduce the flow path resistance. In this way, even if the inclination angle of the first liquid channel 21A 'is large, the channel cross-sectional area is increased, so that an increase in channel resistance due to the inclination can be reduced.

Note that the terms and expressions used in this specification are merely for explanation, and do not limit the present invention at all. Various modifications can be made within the scope of the technical idea of the present invention. Needless to say, it is. For example, the following modifications can be made.
(i) In the above embodiment, the number of liquid passages is four or two, but the number of liquid passages is not necessarily limited to two or more.
(ii) In the above-described embodiment, the first direction S1 is parallel to the paper feed direction, and the third direction S3 is parallel to the scanning direction, but they may not be parallel.
(iii) The input terminal portion and the output terminal portion may be arranged on the inner side (center side) than the first liquid flow path in the first direction S1. For example, as shown in FIG. 9, when the first input terminal portion 14a ′ is on the inner side (center side), there are two first through holes 15B ″ through which the first liquid passage 21A penetrates.
(iv) In the above-described embodiment, the ink jet recording apparatus that ejects ink droplets onto a sheet is described as an example of the liquid droplet ejecting apparatus. However, the present invention is not limited to the ink jet recording apparatus. For example, the present invention includes a droplet discharge device that discharges a droplet of a conductive material onto a substrate of a wiring board in order to form wiring of the wiring board.

DESCRIPTION OF SYMBOLS 1 Inkjet recording device 2 Guide rod 3 Carriage 4 Discharge head 5 Conveyance roller 9 Control board 11 Relay board 12 Wiring path 14 1st wiring board 14A Terminal surface 14B, 14C 1st through-hole 14a 1st input terminal part 14b 2nd input terminal Part 14c output part 14d dummy connection terminal part 14e, 14f wiring 15 second wiring board 15A facing surface 15B, 15C second through hole 15a first output terminal part 15b second output terminal part 15c input part 15d wiring 15da wiring for driving signal 15 db Ground wiring 15 dc Power supply wiring 15 e Dummy terminal portion 15 f Overlapping portion 15 g Flat portion 20 Liquid damper 21 Liquid passage 21 A First liquid passage 21 B Second liquid passage 22 Third wiring board S 1 First direction S 2 Second direction S 3 Third direction

Claims (10)

An ejection head for ejecting droplets;
A control substrate for outputting a drive signal for discharging droplets from the discharge head;
A wiring path for connecting the control board and the ejection head and transmitting the drive signal from the control board to the ejection head;
The wiring path is
A first wiring board having a terminal surface on which the first and second input terminal portions are formed;
Opposite to the terminal surface, the first and second output terminal portions joined to the first and second input terminal portions are opposed to each other, and the first surface extends in a direction orthogonal to the terminal surface. A flexible second wiring board disposed side by side with the wiring board,
The control board, the second wiring board, the first wiring board, and the ejection head are connected in this order,
The second wiring board is
An input section;
A plurality of wirings connecting the input unit and the first and second output terminal units and extending in a first direction;
The second output terminal portion is disposed between the input portion and the first output terminal portion in the first direction;
The liquid droplet ejection device, wherein the first input terminal portion and the second input terminal portion are arranged with a space in the first direction
A third wiring board bonded to the ejection head and the first wiring board;
The first wiring board has an output part to be joined to the third wiring board,
The liquid droplet ejection apparatus according to claim 1, wherein the output unit is disposed between the first input terminal unit and the second input terminal unit in the first direction.
The distance between the control board and the first input terminal portion in the first direction is greater than the distance between the control board and the second input terminal portion in the first direction,
The wiring path connects a power source for driving the ejection head and a constant potential ground to the ejection head,
The first input terminal unit includes one connected to a power source and a ground,
3. The droplet discharge device according to claim 1, wherein the second input terminal unit includes one for transmitting the drive signal. 4.
The ejection head is configured to eject droplets of black, yellow, cyan and magenta,
2. The droplet discharge device according to claim 1, wherein the second input terminal unit includes a drive signal for discharging black and magenta droplets to the liquid discharge head.
The first wiring board has a dummy connection terminal portion that does not conduct the control board and the ejection head,
The plurality of wirings of the second wiring board include a driving signal wiring for transmitting the driving signal and a ground wiring connected to the ground,
The ground wiring is composed of at least two lines, arranged in both sides of the drive signal wiring in the width direction parallel to the terminal surface and perpendicular to the first direction, and the ground wiring includes In the middle, a dummy terminal portion connected to the dummy connection terminal portion of the first wiring board is provided,
The connection part of the dummy terminal part and the dummy connection terminal part is displaced in the first direction with respect to the connection part of the first input terminal part and the first output terminal part. 4. The droplet discharge device according to claim 1.
A liquid flow path for supplying a liquid to the ejection head;
The ejection head and the second wiring board are arranged so as to sandwich the first wiring board in the orthogonal direction,
The first wiring board has a first through hole between the first input terminal portion and the second input terminal portion,
The second wiring board has a second through hole between the first output terminal portion and the second output terminal portion,
The liquid flow path is connected to the ejection head through the first and second through holes;
The second wiring board includes an overlapping portion that is bent and overlapped in the orthogonal direction between the first output terminal portion and the second output terminal portion,
The droplet discharge device according to claim 1, wherein the second through hole is provided in the overlapping portion.
The liquid channel includes first and second liquid channels arranged side by side in the first direction,
The first liquid channel is disposed closer to the first input terminal than the second liquid channel in the first direction;
The second wiring board has the overlapping portion and a flat portion that is not bent and overlapped, and the second through hole corresponding to the first through hole is provided in the flat portion,
The overlapping portion is disposed closer to the first input terminal portion than the planar portion in the first direction;
The first liquid flow path passes through a second through hole in the overlapping portion, and the second liquid flow path passes through a second through hole in the planar portion corresponding to the first through hole. The liquid droplet ejection apparatus described.
8. The droplet discharge device according to claim 6, wherein the second through hole in the overlapping portion is an elongated hole that is parallel to the terminal surface and longer in the first direction than the width direction orthogonal to the first direction.
The first liquid channel is inclined with respect to a virtual axis parallel to the orthogonal direction;
9. The droplet discharge device according to claim 7, wherein the first liquid channel has an inclination angle with respect to the virtual axis larger than that of the second liquid channel.

  The droplet discharge device according to claim 7, wherein the first liquid channel has a channel cross-sectional area larger than that of the second liquid channel.

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