In a power seat operation device, a micro switch is attached inside a dial that is rotatably provided to a side face of a power seat. An opening is formed inside the dial, with an operation portion of a knob to operate the micro switch inserted through the opening. There is accordingly a possibility that liquid might infiltrate into the dial, however a channel is formed inside the dial by the dial and the knob. The channel lets liquid flow downward to the lower side of the micro switch so as to discharge the liquid to outside the dial in cases in which liquid has infiltrated into the dial through the opening in a state in which the opening is positioned at the upper side of the micro switch. The channel is partitioned from the micro switch, enabling flow of liquid to the micro switch to be prevented or suppressed.

The present invention discloses a luminous knob switch and a grill; a knob is rotated to make a relative rotation between a magnet and a magnetic force sensor to control an output signal of the magnetic force sensor to change and thus control operation of a functional member; the luminous knob switch further includes a power adapter to supply power to a functional assembly, and the grill with a luminous knob is powered by the adapter, which eliminates the need to consider battery life and avoids frequent battery replacement by customers.

A switch device includes a knob member rotatably fitted to and supported by a middle serving as a fixing portion, and a rotor member integrally mounted to the knob member and rotatably supported by the middle. A rotation regulating portion that regulates a rotatable range of the knob member with respect to the middle and rotation sliding surfaces in a rotational axis direction of the middle and the knob member are collectively formed.

A dual encoder (07) has a first shaft (09) being mounted in a housing (16) so as to be rotatable, wherein a first locking mechanism, for locking different rotational positions of the first shaft (09), and at least one first rotation signal generator (26, 27), for generating a signal showing a switchover between two locking positions, are provided at the first shaft (09), and having a second shaft (10) being mounted in the housing (16) so as to be coaxially rotatable, wherein a second locking mechanism for locking different rotational positions of the second shaft (10) and at least one second rotation signal generator (28, 29) for generating a signal showing a switchover between two locking positions are provided at the second shaft (10), wherein both shafts (09, 10) include activation elements (11, 12).

An electronic apparatus includes a first rotation operation member, a second rotation operation member, a rotation member, and an exterior member. The second rotation operation member is coaxially rotatable about a rotation axis of the first rotation operation member. The rotation member rotates in accordance with a rotation of the second rotation operation member and has a rotation axis at a position different from a rotation axis of the second rotation operation member. The exterior member has a first hole part for rotatably supporting a shaft part of the first rotation operation member and a second hole part for rotatably supporting a rotation sliding part, on which the second rotation operation member slides, and a shaft part of the rotation member. In response to detection of the rotation member, a phase of the second rotation operation member is detected.