An input device for an in-vehicle device, wherein: the input device comprising a operating knob connected via a multiple switch rod to a multiple switch mounted to a substrate located within a housing containing at least one drain formed in and through the housing, the operating knob externally fitted with a ring member configured to prevent the operating knob being upwardly separated from the multiple switch rod, and wherein a gap exists between an outer surface of the operating knob and the ring member, the gap allowing rotation and tilting movements of the operating knob; wherein a circumferential periphery of the operating knob is positioned relative both to a sidewall in a receiving portion of the housing and also to the at least one drain, the circumferential periphery of the operating knob spaced away from the sidewall and wherein the at least one drain is formed proximate to the sidewall and includes a connected downwardly extending drainpipe (13, 14) and wherein the at least one drain is formed between the sidewall and a ring-shaped face in the receiving portion of the housing, wherein the downwardly extending drainpipe (13, 14) extends downwardly from the receiving portion and through a drainpipe hole (51, 52) in the substrate, and wherein the circumferential periphery of the operating knob is recessed below an upper surface of the sidewall, and the at least one drain is defined by an opening having, when viewed as a vertical cross-section through the housing and relative to the multiple switch rod, a periphery of the opening that is located relatively radially inwardly with respect to the circumferential periphery of the operating knob; the input device configured such that dust or liquid falling incident on an outer surface of the operating knob is deflected off, or channelled by, the outer surface towards and through the gap and towards the sidewall. the input device comprising a operating knob connected via a multiple switch rod to a multiple switch mounted to a substrate located within a housing containing at least one drain formed in and through the housing, the operating knob externally fitted with a ring member configured to prevent the operating knob being upwardly separated from the multiple switch rod, and wherein a gap exists between an outer surface of the operating knob and the ring member, the gap allowing rotation and tilting movements of the operating knob; wherein a circumferential periphery of the operating knob is positioned relative both to a sidewall in a receiving portion of the housing and also to the at least one drain, the circumferential periphery of the operating knob spaced away from the sidewall and wherein the at least one drain is formed proximate to the sidewall and includes a connected downwardly extending drainpipe (13, 14) and wherein the at least one drain is formed between the sidewall and a ring-shaped face in the receiving portion of the housing, wherein the downwardly extending drainpipe (13, 14) extends downwardly from the receiving portion and through a drainpipe hole (51, 52) in the substrate, and wherein the circumferential periphery of the operating knob is recessed below an upper surface of the sidewall, and the at least one drain is defined by an opening having, when viewed as a vertical cross-section through the housing and relative to the multiple switch rod, a periphery of the opening that is located relatively radially inwardly with respect to the circumferential periphery of the operating knob; the input device configured such that dust or liquid falling incident on an outer surface of the operating knob is deflected off, or channelled by, the outer surface towards and through the gap and towards the sidewall.