公开(公告)号：JPH11186080A

公开(公告)日：1999-07-09

申请号：JP35642797

申请日：1997-12-25

Applicant: DENSO CORP

Inventor： CHIBA TOMONARI ,  KAWAI KAZUHIDE

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To improve the filling performance of a filler into a coil case. SOLUTION: A plurality of filling grooves which extend axially are formed into at least the part at a side of a high tension terminal 27 of an outer circumferential surface of a secondary side spool 21, whereon a secondary wiring 22 is wound. A cushion member 23 is arranged in both upper and lower ends of a central core 18 stored in the secondary side spool 21. A cut-out portion is formed in a plurality of places in an outer circumferential part of the cushion member 23 for ensuring an injection path of the filler 30. When the filler 30 is filled, the filler 30 is filled also from an inner diameter side of the secondary wiring 22 through a filling groove in an outer circumferential surface of the secondary side spool 21. Furthermore, the filler 30 is surely filled also in a narrow clearance between the central core 18 and the secondary side spool 21 through a cut-out portion of an outer circumferential part of the cushion member 23.

公开(公告)号：JPH1174139A

公开(公告)日：1999-03-16

申请号：JP21494197

申请日：1997-08-08

Applicant: DENSO CORP

Inventor： SATO YOSHITAKA ,  SUGIURA AKIMITSU ,  AOYAMA MASAHIKO ,  KAWAI KAZUHIDE

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil which generates a desired high-voltage cracks from occurring near the corners at both the ends of a center core. SOLUTION: A rubber cylindrical member 17 is formed like a cylinder through integral molding. The cylindrical member 17 covers the outer side face, axial edge corners, and a part of axial edge faces of a center core 12 composed of a core main body 13 and permanent magnets 14 and 15. Therefore, cracks are prevented from occurring around the outer peripheral side edge of the center core 12, a secondary spool 20, and an epoxy resin 26 near the corners at both ends of the center core 12 where cracks are liable to occur, so that electric discharge is prevented from occurring between a high-voltage part and the center core 12. Furthermore, the cylindrical member 17 is elastically deformed, whereby a force applied to the center core 12 in both radial and axial directions can be relaxed, and magnetostriction is prevented from occurring in the center core 12. As a result of this setup, a desired high voltage can be applied to an ignition plug.

公开(公告)号：JP2009123838A

公开(公告)日：2009-06-04

申请号：JP2007294739

申请日：2007-11-13

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KYODA KENTA ,  KAWAI KAZUHIDE

IPC: H01F38/12 ,  F02P15/00

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil which can prevent an outer peripheral core from being rusted by making the diameter of the coil smaller, and also a method of manufacturing the ignition coil. SOLUTION: An ignition coil 1 includes primary and secondary windings 21, 22 overlapped at inner outer periphery, a central core 23 of a soft magnetic material located at the inner periphery side of the primary and secondary windings 21, 22, a coil case 41 for accommodating the central core 23 and the primary and secondary windings 21, 22, and an outer peripheral core 3 of the soft magnetic material located at the outer peripheral side of the coil case 41. The outer peripheral core 3 includes such a shape as to have a notch-shaped slit 32 along its axial direction by processing a plate-like electromagnetic steel plate into an arc shape. A surface exposure area of the outer peripheral core 3 at its outer periphery including a slit formation area is covered with a coating film 6 made of a heat shrinkable film. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种点火线圈，其可以通过使线圈的直径更小来防止外周铁芯生锈，以及制造点火线圈的方法。 解决方案：点火线圈1包括在内部外周重叠的初级和次级绕组21,22，位于初级和次级绕组21,22的内周侧的软磁性材料的中心芯23，线圈 壳体41，用于容纳位于线圈壳体41的外周侧的软磁性材料的中心芯23和初级和次级绕组21,22以及外周芯3.外周芯3包括这样的形状 通过将板状电磁钢板加工成弧形，沿其轴向具有切口形状的狭缝32。 外周芯3的包括狭缝形成区域的外周的表面曝光区域被由热收缩膜制成的涂膜6覆盖。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2009021451A

公开(公告)日：2009-01-29

申请号：JP2007183678

申请日：2007-07-12

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To solve a problem in which the winding of a secondary coil is broken up to lower the productivity of an ignition coil when forming the spool-less secondary coil with the fusion of self-fusing wire. SOLUTION: A sheet 17 is mounted on the inner peripheral face of the secondary coil 16 on which the self-fusing wire 160 is wound. When fusing the self-fusing wire 160, the secondary coil 16 and the sheet 17 are molded in one unit. This secures the shaping accuracy of the secondary coil 16 to improve the productivity. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为了解决在用自熔丝融合时形成无卷绕次级线圈时，次级线圈的绕组被分解以降低点火线圈的生产率的问题。 解决方案：片材17安装在卷绕有自熔线160的次级线圈16的内周面上。 当熔合自熔线160时，次级线圈16和片17被模制成一个单元。 这确保了次级线圈16的成形精度，以提高生产率。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2007311716A

公开(公告)日：2007-11-29

申请号：JP2006141892

申请日：2006-05-22

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil and a method of manufacturing the same which can effectively reduce air bubbles remaining in thermosetting resin charged into the ignition coil. SOLUTION: An ignition coil 1 includes a primary coil 21; a secondary coil 22; a magnetic component 4 forming a magnetic circuit of the primary coil 21; a resin component 31 supporting the magnetic component 4; and a stress relaxing member 51 which is disposed between the magnetic component 4 and the resin component 31 in the magnetization direction of the magnetic component 4, and relaxes a stress generated between the magnetic component 4 and the resin component 31. The ignition coil 1 is formed by charging the thermosetting resin 11 into a gap in a case 3 for storing the primary coil 21, the secondary coil 22, the magnetic component 4, and the stress relaxing member 51. The stress relaxing member 51 is made of a foam material including a number of closed cells, and a rubber material having a gas transmission rate equal to or higher than that of natural rubber. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够有效地减少加入到点火线圈中的热固性树脂残留的气泡的点火线圈及其制造方法。 点火线圈1包括初级线圈21; 次级线圈22; 形成初级线圈21的磁路的磁性部件4; 支撑磁性部件4的树脂部件31; 以及在磁性部件4的磁化方向上设置在磁性部件4和树脂部件31之间的应力缓和部件51，并且缓和在磁性部件4与树脂部件31之间产生的应力。点火线圈1为 通过将热固性树脂11填充到用于存储初级线圈21，次级线圈22，磁性部件4和应力缓和部件51的壳体3中的间隙中而形成。应力缓和部件51由泡沫材料制成， 多个闭孔，以及气体透过率等于或高于天然橡胶的橡胶材料。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2006173384A

公开(公告)日：2006-06-29

申请号：JP2004364455

申请日：2004-12-16

Applicant: Denso Corp ,  株式会社デンソー

Inventor： TAKEYAMA SHOICHI ,  KAWAI KAZUHIDE

IPC: H01F38/12 ,  F02P15/00 ,  H01T13/04

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil the earth metallic fixture of which can be protected against a damage. SOLUTION: The ignition coil 1 includes a cylinder 2 provided with a primary coil and a secondary coil, and an igniter 3 for supplying power to the primary coil. The igniter 3 includes a flange 32, a connector 33, and the earth metallic fixture 4. The earth metallic fixture 4 includes an earthing connector pin 51 arranged to the connector 33, an annular contact 7 in contact with an engine case 8, and a connector 6 for connecting the annular contact 7 to the earthing connector pin 51. The width of the tip side configuration 611 of the axial direction connector 610 of the connector 6 in a direction orthogonal to the axial direction L of the cylinder 2 is greater than that of a tail end side configuration 613. The tip side configuration 611 is bent toward an axial direction tail end side 202 from the annular contact 7 at a root 323 of the flange 32. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供点火线圈，可以保护其地球金属夹具免受损坏。 解决方案：点火线圈1包括设置有初级线圈和次级线圈的气缸2和用于向初级线圈供电的点火器3。 点火器3包括凸缘32，连接器33和接地金属固定件4.接地金属固定件4包括布置到连接器33的接地连接器针51，与发动机壳体8接触的环形触头7和 连接器6用于将环形触点7连接到接地连接器销51.连接器6的轴向连接器610的与轴向方向L正交的方向的端部侧构造611的宽度大于气缸2的轴向方向L的方向的宽度大于 末端侧构造613.尖端侧构造611在凸缘32的根部323处从环形接触件7向轴向尾端侧202弯曲。版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006108632A

公开(公告)日：2006-04-20

申请号：JP2005197056

申请日：2005-07-06

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE ,  TAKEYAMA SHOICHI

IPC: H01F38/12 ,  H01F41/02

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil in which an insulating sheet is made hard to separate, the winding condition of an insulating sheet on a center core is readily maintained, and increase in the winding number of the insulating sheet is inhibited. SOLUTION: The ignition coil comprises a bar-shaped center core 3 and a cylindrical part, provided with a primary and secondary coils wound concentrically around the center core 3. The insulating sheet 4 is wound on the outer peripheral surface 301 of the center core 3, and the space between the insulating sheet 4 and the cylinder is filled with an insulating resin. The insulating sheet 4 comprises a resin film layer, made of synthetic resin and a bonding layer arranged on the rear surface of the resin film layer. The insulating sheet 4 has a sheet width w 0.8-1.2 times that of the length x in the axial direction of the center core 3, and a winding-finish end 42 is inclined with respect to the axial direction L of the center core 3. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供使绝缘片难以分离的点火线圈，容易保持绝缘片在中心芯上的缠绕状态，并且绝缘片的绕组数量增加是 抑制。

解决方案：点火线圈包括棒形中心芯3和圆柱形部分，其具有围绕中心芯3同心缠绕的初级和次级线圈。绝缘片4缠绕在中心芯3的外周表面301上 中心芯3，并且绝缘片4和圆筒之间的空间填充有绝缘树脂。 绝缘片4包括由合成树脂制成的树脂膜层和布置在树脂膜层的后表面上的接合层。 绝缘片4的宽度w为中心纤芯3的轴向长度x的0.8-1.2倍，卷绕终端42相对于中心纤芯3的轴向L倾斜。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006049821A

公开(公告)日：2006-02-16

申请号：JP2005138811

申请日：2005-05-11

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE ,  AOYAMA MASAHIKO ,  TAKEYAMA SHOICHI

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To solve the problem that a primary coil prevents deformation of a secondary spool and a crack occurs in the secondary spool at the time of a cold cycle in an ignition coil where the primary coil is arranged on an outer peripheral side and a secondary coil on an inner peripheral side and a first coil is filled with epoxy resin. SOLUTION: The stick type ignition coil is formed of a center core 10, the secondary coil 15 on the outer peripheral side of the center core and the primary coil 20 on an outer peripheral side of the secondary coil. The primary coil 20 includes an insulating cylindrical primary spool 21, a conductive layer 30 installed on an outer peripheral face of the primary spool and primary winding 24 wound onto the conductive layer. A gap 33 between the primary spool 21 and primary wiring 24 is not filled with insulating resin. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题为了解决初级线圈在初级线圈布置在外部的点火线圈中的冷循环时，二次线轴的变形和二次线轴发生裂纹的问题 外周侧和内周侧的次级线圈和第一线圈填充有环氧树脂。 解决方案：棒状点火线圈由中心芯10，中心芯的外周侧的次级线圈15和次级线圈的外周侧的初级线圈20形成。 初级线圈20包括绝缘圆柱形初级线轴21，安装在初级线轴的外周面上的导电层30和缠绕在导电层上的初级绕组24。 初级线轴21和主线24之间的间隙33未被绝缘树脂填充。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005317840A

公开(公告)日：2005-11-10

申请号：JP2004135570

申请日：2004-04-30

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE ,  AOYAMA MASAHIKO ,  TAKEYAMA SHOICHI

IPC: F02P15/00 ,  H01F27/02 ,  H01F38/12

CPC classification number: H01F27/022 ,  H01F38/12

Abstract: PROBLEM TO BE SOLVED: To resolve the problem wherein epoxy resin supplied to a head case hardly flows to a space in a body case, and air in the space in the body case is unlikely to escape to the head case, when a holder is arranged under an ignitor in a stick-type ignition coil. SOLUTION: A stick-type ignition coil comprises a primary coil 17 and a secondary coil 21 arranged at the periphery side of a center 15 core; a base case 12 arranged at the periphery side of the primary coil or the secondary coil arranged at the periphery side; a head case 32, in which an ignitor is housed and which is coupled to the upper end of the base case; a holder 41 arranged in between gaps at the upper ends of the center core, the primary coil, and the secondary coil, and the ignitor; and insulating resin 62 filled in a space 61 of spaces among the center core, the primary coil, the secondary coil, the body case, and the holder. The holder is provided with a resin influx opening 36a or the like for making epoxide resin flow into the space, and an air vent 58a or the like for allowing air into the space to escape to the outside. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 解决问题：为了解决提供给头箱的环氧树脂几乎不流到主体壳体中的空间的问题，并且主体壳体中的空间中的空气不太可能逃逸到头部壳体，当 支架设置在点火器下方的棒状点火线圈中。 解决方案：棒状点火线圈包括布置在中心15芯的周边侧的初级线圈17和次级线圈21; 布置在初级线圈或设置在周边侧的次级线圈的周边侧的基部壳体12; 头壳体32，其中容纳了点火器并且联接到基座壳体的上端; 布置在中心芯，初级线圈和次级线圈的上端的间隙之间的保持器41和点火器; 绝缘树脂62填充在中心芯，初级线圈，次级线圈，主体壳体和保持架之间的空间61中。 保持器设置有用于使环氧树脂流入空间的树脂流入口36a等，以及用于使空气进入空间以逸出到外部的通气孔58a等。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005072547A

公开(公告)日：2005-03-17

申请号：JP2003373130

申请日：2003-10-31

Applicant: Denso Corp ,  株式会社デンソー

Inventor： TAKEYAMA SHOICHI ,  KATO HIDEYUKI ,  AOYAMA MASAHIKO ,  KAWAI KAZUHIDE

IPC: H01F38/12 ,  H01F27/32 ,  H01F38/14

CPC classification number: H01F38/14 ,  H01F27/327 ,  Y10T29/4902

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil that can reduce its manufacturing cost, and its simple manufacturing method. SOLUTION: The ignition coil 1 includes a tube-shaped secondary spool 22, secondary windings 23 wound around the outer peripheral surface of the secondary spool 22, a resinous insulator 230 for the winding injected into spacings between the secondary windings 23, a primary spool 240 arranged on the outer peripheral side of the secondary windings 22, primary windings 25 wound around the outer peripheral surface of the primary spool 240, a connector section 31 having connector terminals 311 connected to the primary windings 25 and the second windings 23 arranged to one end in the axial direction of those members, and a resinous insulator 312 for the connector section injected into the connector section 31. The base material of the resinous insulator 230 for the winding and that of the resinous insulator 312 for the connector section are the same, or different from each other. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供可以降低其制造成本的点火线圈及其简单的制造方法。

解决方案：点火线圈1包括管状次级线轴22，缠绕在次级线轴22的外周表面上的次级绕组23，用于绕组的树脂绝缘体230注入到次级绕组23之间的间隔中， 设置在次级绕组22的外周侧的初级线轴240，卷绕在主线轴240的外周面上的初级线圈25，具有连接到初级绕组25的连接器端子311和连接到初级绕组25的第二绕组23的连接器部31， 在这些构件的轴向方向上的一端，以及用于连接器部分注入连接器部分31的树脂绝缘体312。用于绕组的树脂绝缘体230的基材和用于连接器部分的树脂绝缘体312的基材为 相同，或彼此不同。 版权所有（C）2005，JPO＆NCIPI