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61. 发明专利

JPH06166178A INK JET RECORDING HEAD 失效
公开(公告)号：JPH06166178A
公开(公告)日：1994-06-14
申请号：JP35756392
申请日：1992-12-24
申请人： SEIKO EPSON CORP
发明人： NAKA TAKAHIRO , YASUKAWA SHINJI , ABE TOMOAKI , USUI MINORU
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PURPOSE:To position accurately and fix each member which constitutes a recording head. CONSTITUTION:A plate-like piezoelectric element is positioned and fixed on a fixing plate 2, then these are sliced into oscillators 11, and the oscillators 11 have their respective tips held by positioning holes 32 provided on the top 32 of a head frame 3, and positioned in a planar direction. In addition, a cavity- forming base 5 is positioned and fixed on the top 32 of the head frame 3.

62. 发明专利

JPH06143573A INK JET RECORDING HEAD AND MANUFACTURE OF DIAPHRAGM FOR THE SAME 失效
公开(公告)号：JPH06143573A
公开(公告)日：1994-05-24
申请号：JP5655393
申请日：1993-02-22
申请人： SEIKO EPSON CORP
发明人： HOSONO SATOSHI , NAKA TAKAHIRO , YONEKUBO SHUJI , SHINADA SATOSHI , USUI MINORU
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PURPOSE:To efficiently transmit vibration energy of a piezoelectric vibrator to a pressure chamber to be driven. CONSTITUTION:A diaphragm 6 is fixed to a nozzle plate 1 through a channel forming spacer and pressed by a piezoelectric vibrator 15, and vibration of the vibrator 15 is transmitted to a pressure chamber 36 through islands 41 isolated via a thin part 40. Since the islands 41 are remarkably weakened in rigidity from that of a periphery via the part 40, the vibration is not transmitted to the other adjacent pressure chamber 36.

63. 发明专利

JPH068427A DRIVING CIRCUIT FOR INK JET RECORD HEAD 失效
公开(公告)号：JPH068427A
公开(公告)日：1994-01-18
申请号：JP35631192
申请日：1992-12-21
申请人： SEIKO EPSON CORP
发明人： USUI MINORU , YOSHIDA MASAHIKO , ABE TOMOAKI , YONEKUBO SHUJI , HOSONO SATOSHI
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To stabilize the position of meniscus so as to improve printing quality. CONSTITUTION:A power source is connected to a common condenser C1 through a first switching transistor Q2 and a charge time constant adjusting resistance R1. The condenser C1 is also connected to earth through a second switching transistor Q4 and a discharge time constant adjusting resistance R3. Further, a terminal of the condenser C1 is connected to a switching circuit 28 for scanning a pressure generating member through a current buffer. To the first switching transistor Q2, a first pulse for contracting a piezoelectric vibrator is applied and a second pulse for extending the piezoelectric vibrator is applied to the second switching transistor Q4 so as to contract the pressure generating member at a set speed by the condenser C1 and the resistance R1 and attract ink to a pressure chamber. Then, the pressure generating member is extended at the set speed by the condenser C1 and the resistance R3 so as to generate ink drops.

64. 发明专利

JPH05220954A INK JET HEAD 失效
公开(公告)号：JPH05220954A
公开(公告)日：1993-08-31
申请号：JP2283292
申请日：1992-02-07
申请人： SEIKO EPSON CORP
发明人： TANIZAKI MASANORI , USUI MINORU , NAKA TAKAHIRO
IPC分类号： B41J2/045 , B41J2/055 , B41J2/125
摘要： PURPOSE:To prevent the deterioration or damage of a pressure generating member under high-humidity conditions by providing a humidity detection means in the vicinity of pressure generating parts. CONSTITUTION:A humidity detection part 70 made of a member changing in electric resistance value by an atmospheric humidity is provided in the vicinity of pressure generating parts 21. The resistance value of the humidity detection part 70 is fetched by sensor electrodes 71 and read by a comparator or an A/D convertor. Based on this result, a control part restricts the drive of a head and starts a head dehumidifying mechanism.

65. 发明专利

JPH04359578A LAMINATED PIEZOELECTRIC DISPLACEMENT ELEMENT 失效
公开(公告)号：JPH04359578A
公开(公告)日：1992-12-11
申请号：JP13465491
申请日：1991-06-06
申请人： SEIKO EPSON CORP
发明人： HOSONO YOSHIE , USUI MINORU
IPC分类号： H01L41/083 , H01L41/09
摘要： PURPOSE:To provide a laminated piezoelectric displacement element of a structure, wherein a crack and a peeling are not caused in a bonding layer to bond together a base and the laminated piezoelectric displacement element, and moreover, in the case the element is bonded to the base and is used, the element has the directivity of vibration to a single direction, in which there is no generation of a distortion due to a displacement. CONSTITUTION:Piezoelectric materials 3 are alternately provided in a sandwich- form so that conductive layers 1 constituting an electrode on one side and conductive layers 2 constituting the other electrode are formed in parallel to each other. The layers 1 and 2 are provided in such a way that their sites only, which do not overlap with an inactive part 5 or at least a joint 4a with a base 4, are parallel to each other and a site held between the layers 1 and 2 is formed as an active part 6. A displacement part 9 (the active part 6) is vibrated in the directions shown by an arrow A and the part 5 is jointed to the base 4 at the part 4a.

66. 发明专利

JPH0499639A ON-DEMAND TYPE INK JET PRINT HEAD 失效
公开(公告)号：JPH0499639A
公开(公告)日：1992-03-31
申请号：JP21842790
申请日：1990-08-20
申请人： SEIKO EPSON CORP
发明人： OYAMA NORIKO , USUI MINORU
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PURPOSE:To form an appropriate piezoelectric element array to be arranged in an ink tank and allow generation of ink droplets with an adequate scattering capability even at low voltage by covering the peripheral surface of a piezoelectric element with an elastic resin, also covering the free end with an elastic member, and arranging a nozzle plate with a fixed distance from the elastic member through a partition plate. CONSTITUTION:A printing head consists of piezoelectric elements 12, part of each element being fixed to a substrate 14 and solidified with injected elastic resin 10 and an elastic member 16 which covers a free end the elastic resin 10. An independent cable 76 is connected to an external conductive layer 60 to which one electrode of the piezoelectric element 12 is connected, while a common lead member is connected to an external conductive layer 62 to which the other electrode is connected. If an electric signal is applied to an area between the independent cable 76 and the common lead member, piezoelectric materials 34, 34, 34... between electrodes become elongated, and the displacements of piezoelectric materials of each layer are added together to allow displacement of the free end 12a in 'X' direction. A voltage to be applied to an area between electrodes 30, 32 is naturally at a low level as each piezoelectric material layer is extremely thin.

67. 发明专利

JPH0431054A INK JET HEAD 失效
公开(公告)号：JPH0431054A
公开(公告)日：1992-02-03
申请号：JP13897990
申请日：1990-05-29
申请人： SEIKO EPSON CORP
发明人： USUI MINORU
IPC分类号： B41J2/045 , B41J2/055 , B41J2/16
摘要： PURPOSE:To provide an ink reservoir in a sufficiently large size without creating a hindrance to the arrangement of nozzles and a number of the nozzles in a high density by locating the ink reservoir on the opposite side of a pressure producing member from the nozzle. CONSTITUTION:A pressure producing member 100 consists of a piezoelectric body 10 above a nozzle 20, an elastic vibrating body 12 and a common electrode 14. An ink supply opening 22 is provided on an intersecting point 23 of an ink supply passage. An ink reservoir 30 for holding the ink to be supplied to the nozzle 20 is provided on the opposite side of the piezoelectric body 10 from the nozzle, leading to the nozzle 20 through the ink supply opening 22 and the ink supply passage 21. Since the ink reservoir 30 is located on the opposite side of the pressure producing member 100 from the nozzle 20, the ink reservoir 30 can be provided in a sufficiently large size without creating a hindrance to the arrangement of the nozzles 20.

68. 发明专利

JPH03155949A INK JET HEAD 失效
公开(公告)号：JPH03155949A
公开(公告)日：1991-07-03
申请号：JP29460489
申请日：1989-11-13
申请人： SEIKO EPSON CORP
发明人： USUI MINORU , OYAMA NORIKO
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To ensure the enough projection speed and a projection amount of ink drops even when nozzles are arranged in high density and to improve frequency response and projection stability by a method wherein pressure generating members are mounted such that the mounting directions thereof are changed little by little. CONSTITUTION:Pressure generating members 30 are displaced at intervals of 50mum sixteen by sixteen like nozzles 21 and 32 pressure generating members in total are arranged in a zigzagging state. An interval between the nozzles is 0.21mm. Further, since the mounting directions of the pressure generating members 30 are changed little by little, the width of the mounting part of the pressure generating member is 0.30mm, the width of the part, near the nozzle, of the pressure generating member is 0.15mm, and a ratio between the width of the mounting part of the pressure generat ing member and the width of the part, near the nozzle, of the pressure generating member is 2 to 1. Thereby, the tip of the pressure generating member is tapered off toward the end without reducing a natural period so that identical displacement is provided, a distance between the nozzles can be reduced along with the taper-off of the pressure generating member, and density can be increased to a high value. Further, an enough power can be generated by means of low energy.

69. 发明专利

JPH03108553A INK JET HEAD 失效
公开(公告)号：JPH03108553A
公开(公告)日：1991-05-08
申请号：JP24754489
申请日：1989-09-22
申请人： SEIKO EPSON CORP
发明人： USUI MINORU , OYAMA NORIKO
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To increase the displacement of a pressure generation member and improve the frequency response and the jetting stability by a method wherein the pressure generation member is a beam-form member composed of an elastic material and a piezoelectric material having a part less than half in width than the elastic material, and the pressure generation member is supported at both longitudinal ends thereof. CONSTITUTION:A pressure generation member 12 consists of a piezoelectric material 14 and an elastic material 13 and has a center beam structure in the longitudinal direction thereof. A nozzle 10 is formed on the bottom of an elliptically recessed part 17 provided in a recessed groove part 16. The pressure generation member 12 is a beam-form member composed of the elastic material 13 and the piezoelectric material 14 having a part less than half in width than the elastic material 13. In this manner, the displacement of the pressure generation member 12 can be efficiently obtained. An ink jet head having superior frequency response and jetting stability as well as ensuring adequate ink drop jetting speed and amount can be obtained.

70. 发明专利

JPH03108552A INK JET HEAD 失效
公开(公告)号：JPH03108552A
公开(公告)日：1991-05-08
申请号：JP24754389
申请日：1989-09-22
申请人： SEIKO EPSON CORP
发明人： USUI MINORU , OYAMA NORIKO
IPC分类号： B41J2/045 , B41J2/055
摘要： PURPOSE:To increase the displacement of a pressure generation member and improve the frequency response and the jetting stability by a method wherein the pressure generation member is a beam-form member composed of a piezoelec tric material and an elastic material having a part less than half in width than the piezoelectric material, and the pressure generation member is supported at the both longitudinal ends thereof. CONSTITUTION:A pressure generation member 12 consists of an elastic material 14 and a piezoelectric material 13 and has a center beam structure in the longitu dinal direction thereof. A nozzle 10 is formed on the bottom of an elliptically recessed part 17 provided in a recessed groove part 16. The pressure generation member 12 is a beam-form member composed of the piezoelectric material 13 and the elastic material 14 having a part less than half in width than the piezoelectric material 13. The pressure generation member 12 is supported at the both longitudinal ends thereof. In this manner, the displacement of the pressure generation member 12 can be efficiently obtained. An ink jet head having superior frequency response and jetting stability as well as ensuring adequate ink drop jetting speed and amount can be obtained.

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