公开(公告)号：JP2004186583A

公开(公告)日：2004-07-02

申请号：JP2002354139

申请日：2002-12-05

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 provide an ignition coil which is excellent in assembling property for a center core. SOLUTION: The ignition coil 1 is equipped with the rod-shaped center core 21 and a secondary cylindrical spool 22 which is arranged outside the center core 21 and provided with an outer surface as a wound area 222 wound with a secondary winding 23, and a contacting area 5 at which the outer surface of the center core 21 bears against the inner surface of the secondary spool 22 is arranged between the outer surface of the center core 21 and the inner surface of the secondary spool 22. When the center core 21 is inserted and fitted in the hollow of the secondary spool 22, the outer circumferential surface of the center core 21 is guided by the inner circumferential surface of the secondary spool 22. COPYRIGHT: (C)2004,JPO&NCIPI

公开(公告)号：JP2004186578A

公开(公告)日：2004-07-02

申请号：JP2002354127

申请日：2002-12-05

Applicant: Denso Corp ,  株式会社デンソー

Inventor： AOYAMA MASAHIKO ,  TAKEYAMA SHOICHI ,  KAWAI KAZUHIDE

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil that can secure an output voltage on its secondary side and has an outer peripheral core having a small eddy-current loss. SOLUTION: This ignition coil 1 is provided with a bar-shaped central core 21, the cylindrical outer peripheral core 20 which is disposed on the outer peripheral side of the core 21 and forms a magnetic circuit together with the core 21, and a primary coil 25 and a secondary coil 23 both of which are disposed between the cores 21 and 20. This coil 1 is housed in a plug hole. The outer peripheral core 20 is formed of at least one electromagnetic steel sheet having an insulating coating film on at least one surface and wound up a plurality of times. COPYRIGHT: (C)2004,JPO&NCIPI

Abstract translation: 要解决的问题：提供可以确保其二次侧的输出电压并具有小涡流损耗的外周铁心的点火线圈。 解决方案：该点火线圈1设置有条形中心芯21，圆筒形外周芯20设置在芯21的外周侧并与芯21一起形成磁路，并且 初级线圈25和次级线圈23均设置在芯21和20之间。该线圈1容纳在插头孔中。 外周芯20由至少一个电磁钢板形成，该电磁钢板在至少一个表面上具有绝缘涂膜，并且多次重复。 版权所有（C）2004，JPO＆NCIPI

公开(公告)号：JP2004186573A

公开(公告)日：2004-07-02

申请号：JP2002354055

申请日：2002-12-05

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 provide an ignition coil which does not necessarily require a thermal stress relaxing member and is hence capable of reducing its assembling man-hours. SOLUTION: The ignition coil 1 is equipped with a rod-shaped center core unit with a center core 21, a cylindrical internal circumferential side spool 22 arranged on the outer circumferential side of the center core, an internal winding 23 which is wound on the outer surface of the internal circumferential side spool 22 and equipped with a leader 230 that is extracted from the axial end of the internal circumferential side spool 22, and an axial end resin body 40 which is arranged at the one axial end of the internal circumferential side spool 22 to fix the leader 230. The one axial end 210 of the center core unit is held by the axial end resin body 40, and the other axial end is held by the bottom 221 of the internal circumferential side spool 22. COPYRIGHT: (C)2004,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种点火线圈，其不一定需要热应力缓和构件，因此能够减少其组装工时。

解决方案：点火线圈1配备有具有中心芯21的棒状中心芯单元，布置在中心芯的外周侧的圆筒形内周侧线轴22，卷绕的内部绕组23 在内周侧卷轴22的外表面上，并且具有从内周侧卷轴22的轴向端部拔出的引导件230以及设置在内周侧卷轴22的一个轴向端部的轴向端部树脂主体40 周向侧卷轴22以固定引导件230.中心芯单元的一个轴向端部210由轴向端部树脂体40保持，另一个轴向端部由内周侧卷轴22的底部221保持。 P>版权所有（C）2004，JPO＆NCIPI

公开(公告)号：JP2004095589A

公开(公告)日：2004-03-25

申请号：JP2002250713

申请日：2002-08-29

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE ,  NAKAJIMA HIDETOSHI ,  WADA JUNICHI

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil wherein the occurrence of troubles such as cracking of a resin insulator is suppressed. SOLUTION: The ignition coil 1 has a core section 5 having a rod-shape core, a cylindrical spool 4 arranged outside the core section 5 and wrapped with a coil section 40, a resin insulator injected into a gap 11 between the core section 5 and the spool 4 and then hardened, and a core centering member 10 inserted into the gap 11 for centering the core section 5. The linear expansion coefficient of the material constituting the core centering member 10 is designed somewhere between the linear expansion coefficient of the material constituting the spool 4 and that of the resin insulator. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2004006956A

公开(公告)日：2004-01-08

申请号：JP2003275311

申请日：2003-07-16

Applicant: DENSO CORP

Inventor： ADACHI MASAYASU ,  NAKASE YOSHIMI ,  KAWAI KAZUHIDE ,  CHIBA TOMONARI

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil for an internal combustion engine for generating a desired high voltage by suppressing the generation of a crack on a resin insulator near the inside corner of an end in the axial direction of a circumference core without enlarging a size in the diameter direction of the ignition coil. SOLUTION: An attachment part 23b is formed at the end of a primary spool 23 in the low voltage side of a secondary coil 21, and a ring member 51 is fitted to this attachment part 23b. The circumference core 25 is attached to the circumference side of the primary coil 24, and the inside corners at both ends in the axial direction of the circumference core 25 are covered with rubber ring members 50, 51. The ring member 50, 51 prevents an epoxy resin 26 directly contacting with the inside corners at the both ends of the circumference core 25, and therefore the generation of the crack caused by a temperature change at the epoxy resin 26 near the inside corners thereof. This suppresses discharge between the circumference core 25 of a low voltage part and a high voltage part and then the desired high voltage can be applied to an ignition plug. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2003332156A

公开(公告)日：2003-11-21

申请号：JP2002139882

申请日：2002-05-15

Applicant: Denso Corp ,  株式会社デンソー

Inventor： ISHITANI MASAHIRO ,  AOYAMA MASAHIKO ,  KAWAI KAZUHIDE ,  TAUCHI KOJI

IPC: H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil having a primary spool with great adhesive power between a high-tension side end part and a resin insulating material. SOLUTION: The ignition coil is provided with: a housing; a primary spool 3 that is arranged in the housing and has a high-tension side end part 35, a low-tension side end part 36 and a primary winding part 37 that is interposed between the high-tension side end part 35 and the low-tension side end part 36 with a primary winding wound; a secondary spool that is arranged in the housing approximately coaxially with the primary spool 3 with a secondary winding wound; and a resin insulating material that is filled in the housing to secure the insulation between each of the members. The primary spool 3 is provided with an adhesive member 38 comprising an adhesive resin having great adhesive power with the resin insulating material and an exfoliative member 39 comprising an exfoliative resin having the smaller adhesive power with the resin insulating material than that of the adhesive resin. The adhesive member 38 forms at least the high-tension side end part 35. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种具有在高压侧端部和树脂绝缘材料之间具有很大粘合力的初级线轴的点火线圈。

解决方案：点火线圈设有：壳体; 主轴3，其布置在壳体中，并且具有高压侧端部35，低压侧端部36和初级绕组部37，其夹在高压侧端部35和低压侧端部35之间 张力侧端部36具有绕组的初级绕组; 二次线轴，其与初级线轴3大致同轴地布置在壳体中，并具有绕组的次级绕组; 以及填充在壳体中以确保每个构件之间的绝缘的树脂绝缘材料。 主卷轴3设置有粘合剂部件38，该粘合部件38包括与树脂绝缘材料具有很好的粘合力的粘合剂树脂和包含具有比树脂绝缘材料更小的粘合力的剥离性树脂的剥离部件39。 粘合剂构件38至少形成高压侧端部35.版权所有（C）2004，JPO

公开(公告)号：JP2003303724A

公开(公告)日：2003-10-24

申请号：JP2002105111

申请日：2002-04-08

Applicant: Denso Corp ,  株式会社デンソー

Inventor： KAWAI KAZUHIDE ,  AOYAMA MASAHIKO ,  SANO MASAFUYU ,  ABE SHIGEIE ,  INAGAKI MASAHIRO ,  KASAI HAJIME ,  NAKAJIMA HIDETOSHI ,  TOKINAGA KOJI ,  OSUGA KAZUTOYO ,  WADA JUNICHI ,  TAUCHI KOJI ,  TAKEMA KANEO ,  SATO YOSHITAKA ,  AKIMOTO KATSUNORI

IPC: H01F38/12

CPC classification number: H01F38/12 ,  H01F2038/122

Abstract: PROBLEM TO BE SOLVED: To suppress the generation of cracks (flange leakage) in a stick coil due to thermal stress. SOLUTION: The dimension L of a part of a projection 121b which is parallel to the axial direction of a primary spool 121 is set larger than the dimension T of a part parallel to a direction perpendicular to the axial direction of the primary spool 121. Due to this dimensional relationship, the front projected area of the projection 121b viewed from the direction of a resin flow becomes small, hardly causing the disordered flow of the resin and the generation of entrainment voids and welding when the resin is caused to flow between parts corresponding to the projections 121b during forming. Consequently, a decline in the mechanical strength of a base of the projection 121b can be prevented, resulting in preventing the generation of cracks in the base of the projection (flange) 121b due to thermal stress. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：抑制由于热应力引起的棒状线圈中的裂纹（凸缘泄漏）的产生。

解决方案：突起121b的与初级线轴121的轴向平行的部分的尺寸L被设定为大于与垂直于主线轴的轴向方向的方向平行的部分的尺寸T. 由于这种尺寸关系，从树脂流动方向看的突起121b的前投影面积变小，当树脂流动时，几乎不引起树脂的无序流动和产生夹带空隙和焊接 在成形期间对应于突起121b的部分。 因此，可以防止突起121b的基部的机械强度的下降，从而防止由于热应力而在突起（凸缘）121b的基部中产生裂纹。 版权所有（C）2004，JPO

公开(公告)号：JP2003124043A

公开(公告)日：2003-04-25

申请号：JP2001320944

申请日：2001-10-18

Applicant: DENSO CORP

Inventor： TOKINAGA KOJI ,  KONISHI ATSUSHI ,  KAWAI KAZUHIDE

IPC: F02P15/00 ,  H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil wherein the terminal of winding can be processed without increasing the number of parts. SOLUTION: This ignition coil 1 is provided with a bar-like core body 13 made of magnetic material, a secondary coil 21 wound around the outer circumference of the core body 13, a secondary spool 20 that is arranged between the core body 13 and secondary coil 21 and is wound by the secondary coil 21, a primary coil 24 wound around the outer circumference of the secondary coil 21, a primary spool 23 that is arranged between the secondary coil 21 and primary coil 24 and is wound by the primary coil 23, and a connector 30 provided with a terminal 31 to which an electric power is supplied from the outside. A flange 23d is formed on both ends of a shaft of the primary spool 23 to regulate the winding of the primary coil 24 in the axial direction, and it is provided with projections 23dp where the winding end side and winding start side of the winding of the primary coil 24 connecting to the terminal 31 are respectively wound and twisted.

公开(公告)号：JP2002319513A

公开(公告)日：2002-10-31

申请号：JP2002049731

申请日：2002-02-26

Applicant: DENSO CORP

Inventor： ADACHI MASAYASU ,  SHIMOIDE SACHIHIRO ,  OSUGA KAZUTOYO ,  KAWAI KAZUHIDE

IPC: F02P15/00 ,  H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil for internal combustion engine which is easily assembled for a high voltage. SOLUTION: An ignition coil for internal combustion engine is provided with a center core 12, a secondary spool 20, a secondary coil 21, a primary spool 23, a primary coil 24 and an outer periphery core 25, a resin insulating material 1, and a heat shrinkable tube 17 for covering the core part 12 and in the ignition coil. The shrinkage temperature of the tube 17 is set at a temperature higher than a use environmental temperature suitable to the use of the tube 17. Therefore, even though damage is found on the tube 17, for example, the damage can be prevented from spreading at the time of the use of the ignition coil.

公开(公告)号：JP2000243638A

公开(公告)日：2000-09-08

申请号：JP4165199

申请日：1999-02-19

Applicant: DENSO CORP

Inventor： KATO KATSUHISA ,  KAWAI KAZUHIDE ,  OSUGA KAZUTOYO ,  OKA HIDEKI ,  WAKABAYASHI HIROYUKI

IPC: F02P15/00 ,  H01F27/32 ,  H01F38/12

Abstract: PROBLEM TO BE SOLVED: To provide an ignition coil having long service life by restraining the growth of a tree in a spool which is generated by discharge. SOLUTION: In this ignition coil, a primary spool 23 is arranged on the outer periphery of a secondary coil 21. The primary spool 23 uses PBT (polybutylene terephthalate) which has low melting viscosity and is superior in molding fluidity as a resin base material, and to the PBT, 5 wt.% of olefin rubber, 12.5 wt.% of glass fiber and 2.5 wt.% of silica are added, and the spool is formed. A primary coil 24 is formed by winding a winding in which PET (polyethylene terephthalate), silicone, wax, etc., are coated as separating member on the outer periphery of a wire, on the outer periphery of the primary spool 23. Since silica is added to the primary spool 23, the growth of a tree in the primary spool 23 is restrained, oven when discharge is generated between the secondary coil 21 of high potential and the primary coil 24 of low potential and corrosion is generated in the primary spool 23.