Aisin Aw Co., Ltd.

Tomoyuki Tanaka

Keiichiro Irie

Deformation is depressed where cover and connectors are integrally formed from a resin. A core body includes first and second body portions coupled to each other in the axial direction. The first body portion has a tubular shape extending in the axial direction, and a space surrounded by the inner peripheral surface thereof forms a housing space for a member that slides in the axial direction along the inner peripheral surface. The second body portion's outer peripheral surface and a bobbin body portion inner peripheral surface contact each other, and the first body portion outer peripheral surface and a target end portion inner peripheral surface, which is the bobbin body portion's end portion on the side in a direction from the second body portion toward the first body portion in the axial direction, are spaced from each other in at least a part of the region in the circumferential direction.

Electromagnetic drive device and method of manufacturing electromagnetic drive device

An inexpensive solenoid drive device with high magnetic performance is implemented in which a portion accommodating a plunger and a portion attracting the plunger are integrated with a core as a ferromagnetic body. A core includes a magnetic flux limiting portion that is located in a region on the biasing direction side of a first imaginary boundary plane and that is formed so as to have a small thickness in a radial direction, and an increased diameter portion that is formed so that its thickness the radial direction is increased in a continuous or stepwise manner from the first imaginary boundary plane toward the opposite biasing direction side. The increased diameter portion has a recessed portion whose outer surface is recessed toward a radial inner surface with respect to a predetermined increased diameter reference line in axial section of the core.

Growing community of inventors

Konan, Japan

Tomoyuki Tanaka