公开(公告)号：JPH06151216A

公开(公告)日：1994-05-31

申请号：JP29866692

申请日：1992-11-09

Applicant: TDK CORP

Inventor： YAMASHITA MITSUHIRO ,  HATAKEYAMA YUTAKA ,  YANAGISAWA YASUSHI

IPC: H01F27/36 ,  H01F17/04 ,  H01F41/00

Abstract: PURPOSE:To provide a method of manufacturing a magnetic shield type coil device able to improve the production efficiency without damaging the constitution parts. CONSTITUTION:A core 13 on which a coil 14 is wound is arranged directly under an inlet nozzle 4a of a pipe 5 along the inlet direction while arranging a case 15 directly under an outlet nozzle 4b of the pipe 5 along the outlet direction. While pressure sending air from the inlet side of the pipe 5, air is sucked from the outlet side of said pipe 5. The core 13 with the coil 14 passes through inside the pipe 5 by pressure sending and suction of air without inclination for being inserted into a through hole of the case 15. Thereby, the core 13 and the case 15 can be prevented from the damage.

公开(公告)号：JPH05159931A

公开(公告)日：1993-06-25

申请号：JP34767791

申请日：1991-12-04

Applicant: TDK CORP

Inventor： YANAGISAWA YASUSHI ,  YAMASHITA MITSUHIRO ,  HATAKEYAMA YUTAKA ,  SUZUKI TAKESHI

IPC: H01F27/29

Abstract: PURPOSE:To carry out accurate alignment by installing a three-dimensional structure of an inner end portion of a terminal electrode which comprises a central piece having a circular-shaped and projected end portion which projects directed at a recessed part in such a fashion that it is brought into contact with the recessed part of the both end faces of a drum core and two pieces which are located at the both ends of the central piece, facing the both end faces of a sleeve core. CONSTITUTION:A terminal electrode 19 is a chip-inductor having three dimensional structure which comprises a central piece 33 having a circular-shaped and projected inner end portion 25 which projects at a recessed portion of inner end faces 13 of a drum core 3 and two wing pieces 35 which are located at the both sides of the central piece 33 and placed in contact with the both end faces of a sleeve core 1. The end portions 25 are formed in the shape of the letter C while a U-shaped groove 39 is formed at the roots of the central piece 33 and the two wings 35. This construction makes it possible to hold the drum core and sleeve core in accurate alignment and prevent the two wings from adhering to an unnecessary location in the manufacturing process.