According to the present invention there is provided a button assembly, comprising, a platform having at least two electrodes; a dome member which comprises electrically conductive material, wherein the dome member is electrically connected to at least one of said at least two electrodes, and the dome is arranged so that at least a portion of the dome member overlays at least one other of the at least two electrodes, so that when the dome member is selectively collapsed inwardly by the application of force, the dome member will electrically contact said at least one other of the at least two electrodes, so that in its collapse state the dome member electrically connects the at least one of said at least two electrodes with the at least one other of the at least two electrodes; an interface member which comprises, (a) a compression member which is attached to the dome member at a position which overlays said at least one other of the at least two electrodes; (b) a restrictor member which is configured such that it projects towards the platform and the distance between the platform and the restrictor member is less than the distance between said at least one other of the at least two electrodes and portion of the dome which overlays at least one other of the at least two electrodes, and (c) at least one elastic member which connects the restrictor member and the compression member.

A control panel for motor vehicle includes a mount; a printed circuit board, which is fastened on the mount; a facade element, which is assembled on the mount and which covers the printed circuit board; the facade element comprising at least one actionable control key, which is integral with a fixed part of the facade element and which extends above a zone of the printed circuit board; the control key including an end joining the fixed part of the facade element and a mobile free end; the control key includes at its joining end a first protuberance bearing against the mount and/or against the printed circuit board, and includes at its free end a pressing zone provided to be touched by an operator with a view to actuating the control key; the control key also includes a second protuberance arranged between the first protuberance and the pressing zone, said second protuberance having a lesser height than the first protuberance and including at its free end opposite the printed circuit board a bearing surface provided to come into contact with a sensor arranged opposite on the printed circuit board when the control key is actuated.

A control panel for motor vehicle includes a mount; a printed circuit board, which is fastened on the mount; a facade element, which is assembled on the mount and which covers the printed circuit board; the facade element comprising at least one actionable control key, which is integral with a fixed part of the facade element and which extends above a zone of the printed circuit board; the control key including an end joining the fixed part of the facade element and a mobile free end; the control key includes at its joining end a first protuberance bearing against the mount and/or against the printed circuit board, and includes at its free end a pressing zone provided to be touched by an operator with a view to actuating the control key; the control key also includes a second protuberance arranged between the first protuberance and the pressing zone, said second protuberance having a lesser height than the first protuberance and including at its free end opposite the printed circuit board a bearing surface provided to come into contact with a sensor arranged opposite on the printed circuit board when the control key is actuated.

An operation input device includes an operation input unit that is configured to receive a tracing operation performed in a one-dimensional direction. The operation input unit includes a plurality of mechanical switches that are arranged side by side in an operation direction and each include an operation surface subjected to the tracing operation, the operation surface defining a curved surface along the operation direction.

An operation input device includes an operation input unit that is configured to receive a tracing operation performed in a one-dimensional direction. The operation input unit includes a plurality of mechanical switches that are arranged side by side in an operation direction and each include an operation surface subjected to the tracing operation, the operation surface defining a curved surface along the operation direction.

The switch body includes: a wiring substrate where first to fourth fixed contact members are formed; and a movable contact member including a pressure receiving part opposite from the second fixed contact member, a first outer edge facing the first fixed contact member, and a second outer edge facing the third fixed contact member. The fourth fixed contact member is formed in a region outside a projection region being a projection of the movable contact member on the wiring substrate and is in a position facing the first outer edge when the second outer edge is moved to a region where the second fixed contact member is formed.

A pushbutton assembly comprises a base, a pushbutton which is displaceable in a push direction relative to the base from an unactuated rest position into an actuated position and vice versa, and a return device which biases the pushbutton towards the rest position. Further, a self-centering device is provided which comprises a button part and a base part, the button part and the base part of the self-centering device cooperating in the rest position of the pushbutton so as to position the pushbutton in a centered position with respect to the base.

A pushbutton assembly comprises a base, a pushbutton which is displaceable in a push direction relative to the base from an unactuated rest position into an actuated position and vice versa, and a return device which biases the pushbutton towards the rest position. Further, a self-centering device is provided which comprises a button part and a base part, the button part and the base part of the self-centering device cooperating in the rest position of the pushbutton so as to position the pushbutton in a centered position with respect to the base.

A key switch device includes a base including an opening in a central part thereof; a light guide including an elastic body receiving portion, the light guide being supported by the base to be disposed in the opening; a button attached capable of approaching and separating from the base to cover the light guide; an elastic body disposed between the elastic body receiving portion and a lower surface of the button, the elastic body biasing the button in a separating direction where the button is separated from the base; a fixed contact piece including a fixed contact, the fixed contact piece being attached to the base; and a movable contact piece, which is attached to the base, including a movable contact to be brought into contact with the fixed contact when the button is moved toward the base in an approaching direction where the button approaches the base.

A key switch device includes a base including an opening in a central part thereof; a light guide including an elastic body receiving portion, the light guide being supported by the base to be disposed in the opening; a button attached capable of approaching and separating from the base to cover the light guide; an elastic body disposed between the elastic body receiving portion and a lower surface of the button, the elastic body biasing the button in a separating direction where the button is separated from the base; a fixed contact piece including a fixed contact, the fixed contact piece being attached to the base; and a movable contact piece, which is attached to the base, including a movable contact to be brought into contact with the fixed contact when the button is moved toward the base in an approaching direction where the button approaches the base.