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US 5,310,271 AGranted
Solenoid actuator
AssigneeOki Electric Industry Co., Ltd.
InventorsHirokazu Andou, Hideaki Ishimizu, Mitsuru Kishimoto, Masayuki Ishikawa
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Abstract
A print head has a solenoid driving means which employs a filler mixed with a lubricating oil to fix an exciting coil to the core. The filler prevents the layer winding from being shorted due to corrosion of the exciting coil and prevents mechanical abrasion of the armature by supplying lubricating oil during extended operation.
Claims7
A solenoid actuator having a longitudinal axis comprising:
- a core member having an annular portion defining an internal axial cavity surrounding said longitudinal axis, said core member being composed of a ferromagnetic substance;
- an exciting coil wound around said core member;
- an armature disposed adjacent said core member and coaxial with said longitudinal axis;
- lubricating oil located between said core and said armature;
- and
- an internal filler positioned within the cavity in said core member for fixing the exciting coil to the core member, said internal filler being composed of silicone resin oversaturated with an oil having the same composition as said lubricating oil and providing additional lubrication to the armature.
3 more elements
Dependencies are inferred from the claim text.