Title:
METHOD OF MANUFACTURING HEATER
Document Type and Number:
Japanese Patent JP2020076561
Kind Code:
A
Abstract:
To suppress a trouble in the case of fixing a coil to a center shaft.SOLUTION: A rear end portion of a coil member includes a specified part that has an inner diameter smaller than the maximum outer diameter of a fitting portion forming an outer peripheral surface of a tip end portion of a center shaft. The fitting portion of the center shaft is pressed in an inner peripheral side of the specified part on the rear end portion of the coil member, while the coil member is relatively rotated in the same direction as the winding direction from the tip end side of the rear end portion of the coil member to the rear end side with respect to the fitting portion of the center shaft. Otherwise, the fitting portion of the center shaft forms a recessed portion recessed from the tip end surface toward the rear end side. The rear end portion of the coil member includes the specified part having an outer diameter larger than an inner diameter of the recessed portion on the tip end surface. The specified part of the rear end portion of the coil member is pressed in the recessed portion of the center shaft, while the coil member is relatively rotated in the opposite direction to the winding direction from the tip end side of the rear end portion of the coil member to the rear end side with respect to the fitting portion of the center shaft.SELECTED DRAWING: Figure 1
Inventors:
KANEDA ATSUYUKI
Application Number:
JP2018211828A
Publication Date:
May 21, 2020
Filing Date:
November 09, 2018
Export Citation:
Assignee:
NGK SPARK PLUG CO
International Classes:
F23Q7/00; H05B3/18; H05B3/56
Attorney, Agent or Firm:
Fenghwa International Patent Office