Abstract: A keyboard including: a key top; a slide member that is attached to the key top, slides up and down, and presses a contact via an elastic member; a non-slide member that is attached to the key top, and never moves up and down; supporters that support the slide member and the non-slide member, respectively; wherein the slide member is restrained by the key top in a first direction, and is movable in a second direction vertical to the first direction, and the non-slide member is arranged diagonally with the slide member, is movable in the first direction, and is restrained by the key top in the second direction.

Abstract: A polarized electromagnetic relay including an electromagnet assembly, a contact section insulated from the electromagnet assembly, and a force transfer member disposed between the electromagnetic assembly and the contact section. The electromagnet assembly includes an electromagnet, an armature driven by the electromagnet, and a permanent magnet carried on the armature. The armature includes first and second electrically conductive plate elements holding the permanent magnet therebetween in a direction of magnetization of the permanent magnet and disposed to orient the direction of magnetization in parallel with the center axis of the coil. The armature is arranged linearly movably in a direction parallel with the center axis in a state where a part of the first electrically conductive plate element is inserted into a space between the outer peripheral region of the iron core head portion and the distal end region of the yoke major portion.