JP6107645B2 - Liquid discharge head - Google Patents

Liquid discharge head Download PDF

Info

Publication number
JP6107645B2
JP6107645B2 JP2013269866A JP2013269866A JP6107645B2 JP 6107645 B2 JP6107645 B2 JP 6107645B2 JP 2013269866 A JP2013269866 A JP 2013269866A JP 2013269866 A JP2013269866 A JP 2013269866A JP 6107645 B2 JP6107645 B2 JP 6107645B2
Authority
JP
Japan
Prior art keywords
opening
lead
substrate
separation
signal input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2013269866A
Other languages
Japanese (ja)
Other versions
JP2015123673A (en
Inventor
山下 徹
徹 山下
Original Assignee
ブラザー工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ブラザー工業株式会社 filed Critical ブラザー工業株式会社
Priority to JP2013269866A priority Critical patent/JP6107645B2/en
Publication of JP2015123673A publication Critical patent/JP2015123673A/en
Application granted granted Critical
Publication of JP6107645B2 publication Critical patent/JP6107645B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Description

  The present invention relates to a liquid discharge head.
  Patent Document 1 discloses an ink jet recording head (hereinafter referred to as an ink jet head) that performs recording on a recording medium by ejecting ink from nozzles as a liquid ejection head. The ink jet head of Patent Document 1 includes a recording element having a flow path forming member and a heater board, and an electric wiring board.
  The flow path forming member of the recording element and the heater board are laminated together. A plurality of nozzles (discharge ports) are formed in the flow path forming member. The heater board has a plurality of heating resistors as energy generating elements that eject ink from a plurality of nozzles, respectively. The heater board has a plurality of wirings for supplying power to the plurality of heating resistors and a plurality of electrode portions connected to the plurality of wirings on the surface on the flow path forming member side. Yes.
  The electric wiring board is disposed so as to cover the recording element, and is connected to a plurality of electrode portions provided on the heater board. More specifically, the electrical wiring board has a first opening that exposes the flow path forming member and a second opening that exposes the plurality of electrode portions. The first opening and the second opening are separated by a separation band. A plurality of inner leads extend from the edge of the second opening opposite to the separation band to the inside of the second opening. The plurality of inner leads are respectively electrically connected to the plurality of electrode portions of the heater board exposed at the second opening.
JP 2009-292084 A
  In the ink jet head of Patent Document 1, a plurality of inner leads are provided only on one edge (the edge opposite to the separation band) of the second opening of the electric wiring board. In such a configuration, when it is necessary to dispose many inner leads in the second opening, it is necessary to densely arrange a large number of inner leads at the one edge of the second opening. It is also necessary to route a large number of wirings connected to these inner leads at a very narrow pitch. Therefore, in the configuration of Patent Document 1, the number of inner leads that can be arranged in the second opening is limited.
  An object of the present invention is to realize a configuration in which a larger number of inner leads can be disposed in the second opening of the wiring board where a plurality of connection terminals are exposed.
A liquid discharge head according to a first aspect of the present invention includes a head unit and a wiring substrate connected to the head unit, and the head unit includes a first substrate having a plurality of nozzles each discharging liquid, and the first substrate. And a second substrate having an energy generating element that imparts discharge energy to the liquid, and the surface of the second substrate on the first substrate side is connected to the energy generating element. A plurality of connection terminals are disposed, the wiring board is disposed on the opposite side of the second substrate with respect to the first substrate, and is connected to the plurality of connection terminals provided on the second substrate,
The wiring board is provided on the base material, the base material, the first opening exposing the plurality of nozzles of the first substrate, the base material, and the second board provided on the second substrate. A second opening that exposes a plurality of connection terminals; and a separation part that separates the first opening and the second opening of the base material, and the second opening includes A first inner lead extending inward from a portion on the separation portion side of an edge that is a portion around the second opening of the base material, and an inner side from a portion on the opposite side of the edge from the separation portion A second inner lead extending in the direction is provided, and the first inner lead and the second inner lead are connected to the plurality of connection terminals exposed in the second opening.
  In the present invention, in the second opening portion of the wiring board where a plurality of connection terminals are exposed, not only the portion on the opposite side of the separation portion but also the edge portion that is the peripheral portion of the second opening portion, the separation portion side The inner lead is also provided in this part. Therefore, even when it is necessary to arrange a large number of inner leads in the second opening, these inner leads are arranged separately on both sides of the second opening on the separation portion side and the opposite side of the separation portion. In addition, it is possible to secure a certain distance between each other and arrange them with a margin. In addition, the interval between the wirings connected to the inner leads arranged around the second opening can be increased, and the wiring can be easily routed. In addition, for the purpose of improving the reliability of electrical connection, a plurality of inner leads can be connected to one connection terminal.
  In the liquid ejection head according to a second aspect, in the first aspect, the plurality of connection terminals are applied with a signal input terminal to which a signal for driving the energy generating element is input and a predetermined constant potential. The potential supply terminal is connected to both the first inner lead and the second inner lead.
  When the potential of the potential supply terminal varies, driving of the energy generating element connected to the potential supply terminal becomes unstable. In the present invention, since two inner leads are connected to the potential supply terminal, the potential of the potential supply terminal is stabilized. There is also an advantage that the reliability of electrical connection between the potential supply terminal and the wiring board is improved.
  The liquid ejection head according to a third aspect is characterized in that, in the second aspect, the signal input terminal and the potential supply terminal are exposed in one second opening of the wiring board. Is.
  If both the signal input terminal and the potential supply terminal are exposed in one second opening, the connection between the wiring board, the signal input terminal and the potential supply terminal can be performed at one place, and the connection work can be performed. It becomes easy.
According to a fourth aspect of the present invention, there is provided the liquid ejection head according to the second aspect, wherein the wiring board has at least two second openings separated by the first opening and the separation part, Of the two second openings, the signal input terminal is exposed in one of the second openings, the potential supply terminal is exposed in the other second opening, and the one second opening has Only the second inner lead extending from a portion of the edge opposite to the separating portion is provided, and the second inner lead is connected to the signal input terminal,
The other second opening includes a first inner lead extending inward from a portion of the edge on the separation portion side, and a second inner lead extending inward from a portion of the edge opposite to the separation portion. The other second opening is arranged farther from the first opening than the one second opening.
  In the present invention, the signal input terminal and the potential supply terminal are exposed in different second openings. Only the second inner lead is provided in one of the second openings from which the signal input terminal is exposed, and the second inner lead is connected to the signal input terminal. On the other hand, not only the second inner lead but also the first inner lead extending from the separating portion side is provided in the other second opening where the potential supply terminal is exposed.
  The other second opening from which the potential supply terminal is exposed is further away from the first opening than the second opening from which the signal input terminal is exposed. That is, the width of the separation portion between the other second opening and the first opening is larger than the width of the separation portion between the one second opening and the first opening. Accordingly, a space for providing the first inner lead (for example, a space for routing the wiring connected to the inner lead) can be secured in the separation portion between the other second opening and the first opening. .
  According to a fifth aspect of the present invention, in the liquid ejection head according to the first aspect, the plurality of connection terminals include a plurality of signal input terminals to which signals for driving the energy generating elements are input. Among the signal input terminals, the first inner lead is connected to some of the signal input terminals, and the second inner lead is connected to the other signal input terminals. is there.
  With respect to the plurality of signal input terminals, a first inner lead extending from the separation portion side is connected to some signal input terminals, and a second inner lead extending from the opposite side to the separation portion is connected to the remaining signal input terminals. Is connected. In this configuration, the plurality of inner leads respectively connected to the plurality of signal input terminals are arranged separately on both sides of the second opening on the separation portion side and the opposite side of the separation portion. The interval between leads can be increased. Also, the plurality of wirings respectively connected to the plurality of inner leads are separately arranged on both sides of the second opening. Accordingly, it is possible to increase the wiring arrangement interval in each of the edge part around the second opening and the part on the side opposite to the separation part, and the wiring can be easily routed.
The liquid ejection head according to a sixth aspect of the present invention is the liquid ejection head according to any one of the first to fifth aspects, wherein the plurality of connection terminals intersect a direction in which the first opening and the second opening are aligned. The first inner leads arranged side by side and extending from a portion of the edge of the second opening on the separation portion side, and the second inner lead extending from a portion of the edge opposite to the separation portion. The inner leads are arranged so as to be displaced from each other in the predetermined direction, and the first inner lead and the second inner lead are partially overlapped with each other in the predetermined direction. Is.
  By overlapping the tips of the first inner lead and the second inner lead, the width of the second opening (the length in the direction in which the inner lead extends) is secured while ensuring the length of each inner lead to a certain level or more. ) Can be kept small.
  In the present invention, in the second opening of the wiring board, the inner leads are provided not only on the part on the side opposite to the separation part but also on the part on the separation part side. More inner leads can be provided in the second opening where the connection terminal is exposed.
1 is a schematic plan view of a printer according to an embodiment. FIG. 2 is a block diagram schematically illustrating an electrical configuration of a printer. It is a top view of a carriage on which an inkjet head is mounted. It is a bottom view of a carriage on which an inkjet head is mounted. FIG. 5 is an enlarged view of a portion X surrounded by a thick frame in FIG. 4. (A) is the sectional view on the AA line of FIG. 5, (b) is the sectional view on the BB line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is a bottom view of a part of a carriage on which an inkjet head according to a modified embodiment is mounted. It is a bottom view of a part of a carriage on which an ink jet head according to another modification is mounted. It is a bottom view of a part of a carriage on which an ink jet head according to another modification is mounted.
  Next, an embodiment of the present invention will be described. FIG. 1 is a schematic plan view of the printer of this embodiment. FIG. 2 is a block diagram schematically showing the electrical configuration of the printer. First, a schematic configuration of the printer 1 will be described with reference to FIGS. 1 and 2. In the following, the front side in FIG. 1 is defined as the upper side, and the other side of the page is defined as the lower side, and the explanation will be made using direction words “up” and “down” as appropriate.
(Schematic configuration of the printer)
As shown in FIGS. 1 and 2, the printer 1 includes a platen 2, a carriage 3, an inkjet head 4, a transport mechanism 5, a control device 6, and the like.
  On the upper surface of the platen 2, a recording sheet 100 as a recording medium is placed. The carriage 3 is configured to be capable of reciprocating in the left-right direction in FIG. 1 (hereinafter referred to as the scanning direction) along the two guide rails 10 and 11 in a region facing the platen 2. An endless belt 14 is connected to the carriage 3, and the endless belt 14 is driven by a carriage drive motor 15, whereby the carriage 3 moves in the scanning direction.
  The ink jet head 4 (the liquid discharge head of the present invention) is attached to the carriage 3 and moves together with the carriage 3 in the scanning direction. A holder 7 is provided in the housing of the printer 1, and ink cartridges 17 of four colors (for example, black, yellow, cyan, and magenta) are detachably mounted on the holder 7. The inkjet head 4 is connected to four ink cartridges 17 mounted on the holder 7 by a tube (not shown).
  A plurality of nozzles 33 arranged along the transport direction orthogonal to the scanning direction are formed on the lower surface of the ink jet head 4 (the surface on the other side of the paper in FIG. 1). The inkjet head 4 ejects the four colors of ink supplied from the ink cartridge 17 to the recording paper 100 placed on the platen 2 from the plurality of nozzles 33.
  The transport mechanism 5 includes two transport rollers 18 and 19 disposed so as to sandwich the platen 2 in the transport direction. The transport rollers 18 and 19 are driven in synchronization by a transport motor 16 (see FIG. 2). The transport mechanism 5 transports the recording paper 100 placed on the platen 2 in the transport direction by two transport rollers 18 and 19.
  As shown in FIG. 2, the control device 6 includes an application specific integrated circuit (ASIC) 20, a read only memory (ROM) 21 and a random access memory (RAM) 22 connected to the ASIC 20. The control device 6 is connected to the PC 23 which is an external device so as to be able to perform data communication.
  The control device 6 executes various processes such as printing on the recording paper 100 by the ASIC 20 in accordance with a program stored in the ROM 21. For example, in the printing process, the control device 6 controls the inkjet head 4, the carriage drive motor 15, the transport motor 16, and the like based on a print command input from the PC 23 to print an image or the like on the recording paper 100. . Specifically, an ink discharge operation for discharging ink while moving the inkjet head 4 in the scanning direction together with the carriage 3 and a transport operation for transporting the recording paper 100 in the transport direction by the transport rollers 18 and 19 alternately. Let me do it. In the above description, the control device 6 performs various processing by the ASIC 20, but the present invention is not limited to this, and the control device 6 may be realized by any hardware configuration. For example, processing may be realized by sharing functions by two or more ASICs.
(Detailed configuration of inkjet head)
Next, the detailed configuration of the inkjet head 4 will be described. FIG. 3 is a top view of the carriage 3 on which the inkjet head 4 is mounted. FIG. 4 is a bottom view of the carriage 3 on which the inkjet head 4 is mounted. FIG. 5 is an enlarged view of a portion X surrounded by a thick frame in FIG. 6A is a cross-sectional view taken along line AA in FIG. 5, and FIG. 6B is a cross-sectional view taken along line BB in FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.
  As shown in FIGS. 3 and 4, the inkjet head 4 is attached to the lower surface of the carriage 3. The ink jet head 4 includes a head unit 25 and a wiring board 26 connected to the head unit 25.
(Head unit)
The head unit 25 includes a first substrate 31 and a second substrate 32 that are stacked one above the other. Both the first substrate 31 and the second substrate 32 are substrates having a rectangular planar shape. As shown in FIGS. 3 and 4, the second substrate 32 is longer in the transport direction than the first substrate 31. Therefore, both end portions in the transport direction of the second substrate 32 protrude from the first substrate 31 in plan view. As shown in FIGS. 4 to 6, a concave housing 3a is formed on the lower surface of the carriage 3 (the upper surface in FIG. 6), and the head substrate 25 has the first substrate 31 below (in FIG. 6). It is accommodated in the accommodating portion 3a in a posture that becomes the upper side.
  The first substrate 31 is made of, for example, a synthetic resin material. The first substrate 31 has a plurality of nozzles 33 that eject ink. As shown in FIGS. 3 and 4, the plurality of nozzles 33 are arranged in the transport direction, and constitute four nozzle rows corresponding to the four colors of ink, respectively. As shown in FIG. 7, the first substrate 31 is also formed with a plurality of individual channels 34 respectively communicating with the plurality of nozzles 33. In FIG. 7, the symbol “I” indicates ink filled in the individual flow path 34.
  The second substrate 32 is, for example, a silicon substrate. As shown in FIG. 7, the second substrate 32 is formed with ink supply channels 35 communicating with the plurality of individual channels 34 of the first substrate 31. Ink supplied from the ink cartridge 17 (see FIG. 1) is introduced into the ink supply channel 35, and ink is further supplied from the ink supply channel 35 to the plurality of individual channels 34.
  The second substrate 32 is provided with an energy generating element that gives ejection energy to the ink in the nozzle 33. Although the energy generating element is not limited to a specific configuration, as shown in FIGS. 5 and 7, in the present embodiment, as an example of the energy generating element, a heating resistor that generates thermal energy in ink. 37. A plurality of heating resistors 37 corresponding to the plurality of nozzles 33 are provided on the second substrate 32. As shown in FIG. 7, each heating resistor 37 is disposed on a wall surface portion of the individual flow path 34 that communicates with the corresponding nozzle 33 and faces the nozzle 33. The heating resistor 37 is covered with a protective film 40 and is not directly exposed to the individual flow path 34. The second substrate 32 includes a plurality of individual electrodes 38 provided on the plurality of heating resistors 37 and a common electrode 39 provided in common on the plurality of heating resistors 37. The potential of each individual electrode 38 changes when a drive signal is applied from a driver IC 41 described later. On the other hand, the common electrode 39 is always maintained at the ground potential.
  When a drive signal is applied to the individual electrode 38 of a certain heating resistor 37, the potential of the individual electrode 38 changes and current is supplied to the heating resistor 37, and heat energy is generated in the heating resistor 37. Due to this thermal energy, film boiling occurs in the ink in the individual flow path 34, bubbles are generated in the ink, and further, the bubbles grow, whereby the ink is discharged from the nozzles 33 communicating with the individual flow paths 34.
  As shown in FIGS. 4 to 6, a plurality of connection terminals 42 are provided on the lower surfaces of both end portions of the second substrate 32 that protrude from the first substrate 31. These connection terminals 42 are connected to a wiring board 26 described later. A plurality of connection terminals 42 are arranged in the scanning direction at each of both ends in the transport direction of the second substrate 32. Of the plurality of connection terminals 42 arranged in a line in the scanning direction, the connection terminal 42 located at one end in the arrangement direction is a terminal to which a predetermined drive potential is constantly applied (hereinafter referred to as a first potential). Also referred to as supply terminal 42a1). Further, the connection terminal 42 located at the other end in the arrangement direction is a terminal that is always maintained at the ground potential (hereinafter also referred to as a second potential supply terminal 42a2). The plurality of connection terminals 42 positioned between the two potential supply terminals 42a1 and 42a2 drive the plurality of heating resistors 37 from the control device 6 (see FIG. 2) via the wiring board 26. Are input to the signal (hereinafter also referred to as signal input terminal 42b).
  Although not shown in FIGS. 3 and 4, driver ICs 41 (see FIG. 2) that individually drive the plurality of heating resistors 37 are arranged on the second substrate 32. The driver IC 41 is connected to a plurality of connection terminals 42 by wiring (not shown) formed on the second substrate 32. The driver IC 41 is also connected to the individual electrodes 38 and the common electrode 39 (see FIG. 7) of the plurality of heating resistors 37 by wiring (not shown) formed on the second substrate 32. The driver IC 41 generates a drive signal based on signals input from the control device 6 to the plurality of signal input terminals 42 b, and individually outputs the drive signals to the individual electrodes 38 of the plurality of heating resistors 37.
(Wiring board)
The wiring board 26 is a flexible board having a flexible base material 50 formed of a synthetic resin material such as polyimide. As shown in FIGS. 3 to 6, the wiring board 26 is disposed on the opposite side (lower side) of the second board 32 with respect to the first board 31 of the head unit 25. In particular, as shown in FIG. The wiring board 26 is bonded to the peripheral area of the housing 3 a on the lower surface of the carriage 3 with an adhesive 54. In FIG. 5, the wiring board 26 is hatched so that the area covered by the wiring board 26 and the area not covered by the wiring board 26 can be easily understood. Also, as shown in FIGS. 5 and 6, a plurality of wirings 53 are formed on the flexible base material 50 of the wiring board 26. The wiring board 26 is connected to the plurality of connection terminals 42 of the head unit 25 and the control device 6 (see FIG. 2). The wiring board 26 controls the driver IC 41 output from the control device 6. A signal is transmitted to the head unit 25 via a plurality of wirings 53.
  As shown in FIGS. 4 to 6, the flexible base material 50 of the wiring board 26 includes a first opening 51 and two pieces disposed on both sides in the transport direction with respect to the first opening 51. A second opening 52 is formed. The first opening 51 is a rectangular opening that is long in the transport direction (arrangement direction of the nozzles 33), and exposes the plurality of nozzles 33 of the first substrate 31. Each of the two second openings 52 is a rectangular opening that is long in the scanning direction. These two second openings 52 are for exposing the rows of two connection terminals 42 arranged at both ends of the second substrate 32 in the transport direction. The first opening 51 and the second opening 52 are separated by a separating portion 55 that extends in the scanning direction.
  The second opening 52 is provided with a plurality of inner leads 54 connected to the plurality of connection terminals 42 of the second substrate 32. More specifically, a plurality of first inner leads 54 a extending inwardly from a portion 56 a on the separating portion 55 side of the edge portion 56 that is a portion around the second opening 52 of the base material 50, and the edge portion 56. A plurality of second inner leads 54b extending inwardly from the portion 56b opposite to the separation portion 55 are provided. The plurality of first inner leads 54 a are arranged at intervals in the scanning direction at the portion 56 a of the edge portion 56. The plurality of second inner leads 54 b are also arranged at intervals in the scanning direction in the portion 56 a of the edge portion 56. Note that the plurality of first inner leads 54a and the plurality of second inner leads 54b are arranged with their positions shifted in the scanning direction. More specifically, the plurality of first inner leads 54a and the plurality of second inner leads 54b are alternately arranged in the scanning direction. Furthermore, in the scanning direction, the leading end portions of the plurality of first inner leads 54 a extending from the separation portion 55 side overlap with the leading end portions of the plurality of second inner leads 54 b extending from the side opposite to the separation portion 55.
  Of the plurality of connection terminals 42, two potential supply terminals 42 a (42 a 1 and 42 a 2) located at both ends are each provided with a first inner lead 54 a extending from a portion 56 a on the separation portion 55 side of the edge portion 56, and an edge portion. Both of the second inner leads 54b extending from the portion 56a opposite to the separation portion 55 side of 56 are connected. 4 and 5, a total of two inner leads 54, one first inner lead 54a and one second inner lead 54b, are connected to one potential supply terminal 42a. The number of inner leads 54 is not limited to this. Two or more first inner leads 54a may be connected to one potential supply terminal 42a, or two or more second inner leads 54b may be connected. On the other hand, only one of the first inner lead 54a and the second inner lead 54b is connected to the other signal input terminals 42b.
  As shown in FIGS. 5 and 6, the plurality of first inner leads 54 a are connected to the plurality of first wirings 53 a formed on the flexible base material 50, respectively. The plurality of first wirings 53 a are routed on the back surface (the surface on the second substrate 32 side) of the separation portion 55 including the portion 56 a of the edge portion 56 and connected to the driver IC 41. The plurality of second inner leads 54 b are also connected to the plurality of second wirings 53 b formed on the flexible base material 50, respectively. The plurality of second wirings 53b are routed on the back surface of the portion of the flexible substrate 50 opposite to the separation portion 55 (including the portion 56a of the edge portion 56) across the second opening 52, It is connected to the driver IC 41.
  As shown in FIG. 6, a flowable thermosetting resin sealing material 57 is injected into the second opening 52. The sealing material 57 covers the plurality of connection terminals 42, the plurality of first inner leads 54 a, and the plurality of second inner leads 54 b with the sealing material 57 injected into the second opening 52. The sealing material 57 injected around the connection terminal 42 tends to flow to the first substrate 31 on which the plurality of nozzles 33 are formed, but the first opening 51 and the second opening 52 are connected to each other. The separating portion 55 that separates the flow of the sealing material 57 to the first substrate 31 is suppressed.
  In the embodiment described above, as shown in FIGS. 4 and 5, the separation portion 55 side of the edge portion 56 of the base member 50 in the second opening 52 of the wiring substrate 26 where the plurality of connection terminals 42 are exposed. Inner leads 54 are provided not only on the portion 56a on the opposite side but also on the portion 56a on the separating portion 55 side. Therefore, even when it is necessary to dispose many inner leads 54 in the second opening 52, these inner leads 54 are divided into portions 56a and 56b on both sides of the second opening 52 of the base member 50. By doing so, it can arrange | position with sufficient margin, ensuring a mutual space | interval more than fixed.
  Both the first inner lead 54a and the second inner lead 54b are connected to two potential supply terminals 42a (42a1, 42a2) to which a constant potential is applied among the plurality of connection terminals 42. When the potential of the potential supply terminal 42a fluctuates, driving of the heating resistor 37 by the driver IC 41 connected to the potential supply terminal 42a becomes unstable. Specifically, the waveform of the drive signal supplied to the individual electrode 38 varies, or the potential of the common electrode 39 varies. In this regard, by connecting the two inner leads 54 to each of the two potential supply terminals 42a, the two types of potentials applied to the two potential supply terminals 42a are stabilized, and the driver IC 41 The driving of the heating resistor 37 due to is also stabilized. In addition, since the two inner leads 54 are connected to one potential supply terminal 42a, the electrical connection between the potential supply terminal 42a and the wiring board 26 can be improved as compared with the case where only one inner lead 54 is connected. There is also an advantage that reliability is improved.
  On the other hand, with respect to the plurality of signal input terminals 42b, the first inner leads 54a extending from the separation portion 55 side are connected to some signal input terminals 42b, and the other signal input terminals 42b are opposite to the separation portion 55. A second inner lead 54b extending from the side is connected. That is, since the plurality of inner leads 54 respectively connected to the plurality of signal input terminals 42b are divided into two portions 56a and 56b of the edge portion 56 sandwiching the second opening 52, each portion 56a. , 56b, the interval between the inner leads 54 can be increased. Further, the plurality of wirings 53 connected to the plurality of inner leads 54 are also arranged in two portions 56 a and 56 b of the edge portion 56. Therefore, the arrangement interval of the wiring 53 can be increased in each of the portion 56a on the separation portion 55 side of the edge portion 56 and the portion 56a on the opposite side to the separation portion 55 side. Further, when the inner lead 54 is disposed only on the side opposite to the separation portion 55 as in the conventional case, the route for routing the wiring 53 is concentrated on a specific portion, and it is difficult to route the wiring 53. However, in this embodiment, since the inner lead 54 is also arranged on the separation portion 55 side, the route for routing the wiring 53 is more dispersed than the conventional one, and the wiring 53 can be easily routed.
  As shown in FIG. 4, in the present embodiment, in one second opening 52, there are two types of connection terminals 42: a potential supply terminal 42a to which a constant potential is applied and a signal input terminal 42b to which a signal is input. Is exposed. Therefore, the wiring board 26 can be connected to the potential supply terminal 42a and the signal input terminal 42b at one place, and the connection work is facilitated.
  As shown in FIGS. 4 and 5, the first inner lead 54a and the second inner lead 54b are arranged with their positions shifted in the scanning direction which is the arrangement direction thereof. More specifically, the first inner leads 54a and the second inner leads 54b are alternately arranged in the scanning direction. Further, the first inner leads 54a and the second inner leads 54b partially overlap each other in the scanning direction. As described above, the end portions of the first inner lead 54a and the second inner lead 54b are overlapped with each other, so that the length of each inner lead 54 is secured to a certain length or more and the width of the second opening 52 (inner lead). (Length in the direction in which 54 extends) can be kept small.
  Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.
1] In the above-described embodiment, the first inner lead 54a and the second inner lead 54b connected to one potential supply terminal 42a are shifted from each other in the scanning direction, which is the arrangement direction of the plurality of connection terminals 42. However, as shown in FIG. 8, the positions of the first inner lead 154a and the second inner lead 154b in the scanning direction may coincide with each other. However, in this configuration, the first inner lead 154a and the second inner lead 154b do not overlap each other in the extending direction, so that the width of the second opening 52 (the inner lead 154 The length in the extending direction) is larger than that in FIGS. 4 and 5 of the above embodiment.
2] The potential supply terminal 42a and the signal input terminal 42b may be exposed by separate second openings 252a and 252b, respectively. In FIG. 9, a second opening 252a from which the potential supply terminal 42a is exposed and a second opening 252b from which the signal input terminal 42b is exposed are formed in the flexible base material 50 of the wiring board 26. The second opening 252a is separated from the first opening 51 by the separation part 255a, and the second opening 252b is also separated from the first opening 51 by the separation part 255b. Both the first inner lead 254a and the second inner lead 254b are connected to each of the two potential supply terminals 242a exposed in the second opening 252a. Only one of the first inner lead 254a and the second inner lead 254b is connected to each of the plurality of signal input terminals 242b exposed in the second opening 252b.
3] In the above-described embodiment, the first inner leads 54a extending from the separation portion 55 side are connected to some of the signal input terminals 42b, and the remaining signal input terminals 42b are connected to the first inner lead 54a from the opposite side of the separation portion 55. 2 Inner leads 54b are connected. On the other hand, all the inner leads connected to the signal input terminals may be the first inner leads extending from the separation portion side. Alternatively, all may be second inner leads extending from the side opposite to the separation portion. For example, in FIG. 10, only the second inner lead 354b extending from the side opposite to the separating portion 55b is provided in the second opening 352b from which the plurality of signal input terminals 342b are exposed. The second inner lead 354b is connected. That is, the first inner lead 354a is not provided in the second opening 352b. The second opening 352a from which the potential supply terminal 342a is exposed is provided with a first inner lead 354a extending from the separation portion 355a side and a second inner lead 354b extending from the opposite side of the separation portion 355a. Both the first inner lead 354a and the second inner lead 354b are connected to one potential supply terminal 342a.
  In FIG. 10, similarly to FIG. 9 described above, the signal input terminal 342b and the potential supply terminal 342a are exposed through different second openings 352a and 352b, respectively. In this configuration, since the first inner lead 354a is not provided in the second opening 352b that exposes the signal input terminal 342b, the separation portion 355b that separates the second opening 352b and the first opening 51 is provided in the second opening 352b. The first wiring 53a conducting to the first inner lead 354a is not disposed. Accordingly, it is sufficient that the separation portion 355b has a predetermined width or more that can prevent the sealing material injected into the second opening 352b from flowing out to the first substrate 31.
  On the other hand, since the first inner lead 354a is provided in the second opening 352a that exposes the potential supply terminal 342a, the separation part 355a that separates the second opening 352a and the first opening 51 includes the first opening 352a. A wiring that conducts to the inner lead 354a is disposed. Therefore, in FIG. 10, the second opening 352a exposing the potential supply terminal 342a is farther from the first opening 51 than the second opening 352b exposing the signal input terminal 342b. The width of the separation portion 355a between the second opening 352a and the first opening 51 needs to be larger than the predetermined width that can prevent the sealing material from flowing out to the first substrate 31 described above. Therefore, the width of the separation part 355 a is larger than the width of the separation part 355 b between the second opening 352 b and the first opening 51. Accordingly, a space for providing the first inner lead 354a in the separation portion 355a between the second opening 352a and the first opening 51 (a space for routing the first wiring 53a connected to the inner lead 354a, etc.) ) Can be secured.
4] In the above embodiment, only one of the first inner lead 54a and the second inner lead 54b is connected to one signal input terminal 42b. Both the first inner lead 54a and the second inner lead 54b may be connected. In this configuration, since the number of inner leads 54 connected to one signal input terminal 42b is increased, the reliability of electrical connection between the signal input terminal 42b and the wiring board 26 can be improved. Alternatively, one signal input terminal 42b can input a certain type of signal through the first inner lead 54a, and can input another type of signal through the second inner lead 54b. For example, one signal input terminal 42b is connected to two different signal output units of the control device 6 by the first inner lead 54a and the second inner lead 54b, respectively, and is completely different two types output from the control device 6. These signals may be used as input terminals for selectively inputting the signals. As a specific example, during the printing operation of the inkjet head, a printing control signal for controlling the driver IC is input from the control device to the signal input terminal 42b. On the other hand, during standby of the ink jet head, a signal for causing the control device 6 to perform some inspection of the ink jet head is input to the signal input terminal 42b.
4 Inkjet head 25 Head unit 26 Wiring substrate 31 First substrate 32 Second substrate 33 Nozzle 37 Heating resistor 42 Connection terminals 42a, 242a, 342a Potential supply terminals 42b, 242b, 342b Signal input terminal 50 Flexible substrate 51 First 1 opening 52, 252a, 252b, 352a, 352b 2nd opening 54a, 154a, 254a, 354a 1st inner lead 54b, 154b, 254b, 354b 2nd inner lead 55, 255a, 255b, 355a, 355b Separation part

Claims (6)

  1. A head unit and a wiring board connected to the head unit;
    The head unit is
    A first substrate having a plurality of nozzles each discharging liquid;
    A second substrate that is stacked on the first substrate and has an energy generating element that imparts ejection energy to the liquid;
    A plurality of connection terminals connected to the energy generating element are disposed on the surface of the second substrate on the first substrate side,
    The wiring board is disposed on the opposite side to the second board with respect to the first board, and is connected to the plurality of connection terminals provided on the second board,
    The wiring board is provided on the base material, the base material, the first opening exposing the plurality of nozzles of the first substrate, the base material, and the second board provided on the second substrate. A second opening that exposes a plurality of connection terminals; and a separating portion that is a portion of the base that separates the first opening and the second opening;
    The second opening includes a first inner lead extending inwardly from a part on the separation part side of an edge that is a part around the second opening of the base material, and the separation part of the edge A second inner lead extending inward from the opposite side portion is provided,
    The liquid ejection head, wherein the first inner lead and the second inner lead are connected to the plurality of connection terminals exposed in the second opening.
  2. The plurality of connection terminals include a signal input terminal to which a signal for driving the energy generating element is input, and a potential supply terminal to which a predetermined constant potential is applied,
    The liquid ejection head according to claim 1, wherein both the first inner lead and the second inner lead are connected to the potential supply terminal.
  3.   3. The liquid ejection head according to claim 2, wherein the signal input terminal and the potential supply terminal are exposed in one second opening of the wiring board.
  4. The wiring board has at least two second openings separated by the first opening and the separation part, respectively.
    Of the two second openings, the signal input terminal is exposed in one of the second openings, and the potential supply terminal is exposed in the other second opening,
    The one second opening is provided with only the second inner lead extending from a portion of the edge opposite to the separation portion, and the second inner lead is connected to the signal input terminal,
    The other second opening includes a first inner lead extending inward from a portion of the edge on the separation portion side and a second inner lead extending inward from a portion of the edge opposite to the separation portion. A lead is provided,
    3. The liquid ejection head according to claim 2, wherein the other second opening is disposed farther from the first opening than the one second opening. 4.
  5. The plurality of connection terminals include a plurality of signal input terminals to which signals for driving the energy generating elements are input.
    The first inner lead is connected to some of the plurality of signal input terminals, and the second inner lead is connected to the other signal input terminals. The liquid discharge head according to claim 1.
  6. The plurality of connection terminals are arranged side by side along a predetermined direction that intersects the direction in which the first opening and the second opening are arranged,
    The first inner lead extending from a portion of the edge of the second opening on the side of the separating portion and the second inner lead extending from a portion of the edge opposite to the separating portion are in the predetermined direction. Are arranged out of position with each other,
    The liquid discharge head according to claim 1, wherein the first inner lead and the second inner lead partially overlap each other in the predetermined direction.
JP2013269866A 2013-12-26 2013-12-26 Liquid discharge head Active JP6107645B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013269866A JP6107645B2 (en) 2013-12-26 2013-12-26 Liquid discharge head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013269866A JP6107645B2 (en) 2013-12-26 2013-12-26 Liquid discharge head

Publications (2)

Publication Number Publication Date
JP2015123673A JP2015123673A (en) 2015-07-06
JP6107645B2 true JP6107645B2 (en) 2017-04-05

Family

ID=53534750

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013269866A Active JP6107645B2 (en) 2013-12-26 2013-12-26 Liquid discharge head

Country Status (1)

Country Link
JP (1) JP6107645B2 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4290154B2 (en) * 2004-12-08 2009-07-01 キヤノン株式会社 Liquid discharge recording head and ink jet recording apparatus
JP4845415B2 (en) * 2005-04-18 2011-12-28 キヤノン株式会社 Inkjet recording head
JP2007301937A (en) * 2006-05-15 2007-11-22 Canon Inc Recording head and board for the recording head
JP4455555B2 (en) * 2006-08-21 2010-04-21 キヤノン株式会社 Liquid discharge recording head and manufacturing method thereof
JP2008049521A (en) * 2006-08-23 2008-03-06 Canon Inc Liquid delivering and recording head
JP2008062463A (en) * 2006-09-06 2008-03-21 Canon Inc Liquid delivering head and recording apparatus
JP2009298105A (en) * 2008-06-17 2009-12-24 Canon Inc Liquid discharge head and manufacturing method thereof

Also Published As

Publication number Publication date
JP2015123673A (en) 2015-07-06

Similar Documents

Publication Publication Date Title
JP6492756B2 (en) Liquid ejection device
EP2923838B1 (en) Liquid ejection apparatus and method for producing liquid ejection apparatus
JP5941645B2 (en) Liquid ejecting head and liquid ejecting apparatus
US9039126B2 (en) Liquid ejection head substrate and liquid ejection head
US8075098B2 (en) Electronic apparatus and flexible wiring member
JP6375992B2 (en) Liquid ejecting apparatus and method for manufacturing piezoelectric actuator
JP4726195B2 (en) Liquid discharge recording head and liquid discharge recording apparatus including the same
JP6676981B2 (en) Liquid ejection device
JP6413805B2 (en) Liquid ejection device
JPWO2016017552A1 (en) Inkjet head and printer
JP5447404B2 (en) Liquid ejection device
JP6107645B2 (en) Liquid discharge head
US9751309B2 (en) Liquid ejecting apparatus
JP6455167B2 (en) Liquid ejection device
JP2011011357A (en) Liquid ejector
EP3147122B1 (en) Liquid ejecting device
JP6312547B2 (en) Inkjet head and printer
JP2017081131A (en) Inkjet recording head and inkjet recording device including the same
JP6375973B2 (en) Liquid ejection device and method of manufacturing liquid ejection device
JP6338994B2 (en) Inkjet head and printer
JP6288450B2 (en) Liquid ejecting head and liquid ejecting apparatus
US10040284B2 (en) Discharge element substrate, printhead, and printing apparatus
JP2016132124A (en) Liquid discharge device
JP6386324B2 (en) Inkjet head and printer
JP2017132046A (en) Liquid discharge device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160325

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170120

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20170207

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20170220

R150 Certificate of patent or registration of utility model

Ref document number: 6107645

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150