A capacitive sensor that includes: a sensing electrode having a capacitance to be measured; an alternating voltage source, configured to apply an alternating voltage to the sensing electrode; a capacitive first transfer device; a measurement circuit configured to measure the capacitance of the sensing electrode; and a switching arrangement. The switching arrangement is configured to alternately, in a first switching state, connect the first transfer device to the sensing electrode to enable a charge transfer from the sensing electrode to the first transfer device and, in a second switching state, connect the first transfer device to the measurement circuit to enable a charge transfer from the first transfer device to the measurement circuit.

A capacitive sensor that includes: a sensing electrode having a capacitance to be measured; an alternating voltage source, configured to apply an alternating voltage to the sensing electrode; a capacitive first transfer device; a measurement circuit configured to measure the capacitance of the sensing electrode; and a switching arrangement. The switching arrangement is configured to alternately, in a first switching state, connect the first transfer device to the sensing electrode to enable a charge transfer from the sensing electrode to the first transfer device and, in a second switching state, connect the first transfer device to the measurement circuit to enable a charge transfer from the first transfer device to the measurement circuit.

A method for producing a film composite for electrical connection inside a power electronic switching device has the steps: A) forming a film composite having an electrically insulating insulant film with a first and a second main face. A first electrically conductive metal film, forms conductor tracks insulated from one another on the first main face, and having a second electrically conductive metal film forming conductor tracks arranged insulated from one another on the second main face of the insulant film; B) folding the film composite on a fold line, so that a first contact face of a first conductor track lies on a first contact face of a second conductor track of the first main face, and a second contact face of this first conductor track of the first main face lies on a second contact face of the second conductor track of the first main.

A keyswitch structure includes a keycap support mechanism and a keycap that is supported by the keycap support mechanism in a vertical direction. The keycap support mechanism includes a base and two supports. The base has two sliding slots. Each sliding slot has an opening in a horizontal direction and an obstruction block at the opening. The horizontal direction is perpendicular to the vertical direction. Each support has a sliding portion and a linkage portion. The sliding portions slide parallel to the horizontal direction in the sliding slots correspondingly. The obstruction block prevents the corresponding sliding portion from disengaging from the corresponding sliding slot. The two linkage portions push against each other in line contact, so that the two supports are mutually driven through the two linkage portions.

A keyswitch structure includes a keycap support mechanism and a keycap that is supported by the keycap support mechanism in a vertical direction. The keycap support mechanism includes a base and two supports. The base has two sliding slots. Each sliding slot has an opening in a horizontal direction and an obstruction block at the opening. The horizontal direction is perpendicular to the vertical direction. Each support has a sliding portion and a linkage portion. The sliding portions slide parallel to the horizontal direction in the sliding slots correspondingly. The obstruction block prevents the corresponding sliding portion from disengaging from the corresponding sliding slot. The two linkage portions push against each other in line contact, so that the two supports are mutually driven through the two linkage portions.

Provided is an in-vehicle operation button installation structure, including: a surface material in which a button operation unit is formed on a portion; and an operation button assembly attached to a back surface of the surface material and including a button corresponding to the button operation unit.

Provided is an in-vehicle operation button installation structure, including: a surface material in which a button operation unit is formed on a portion; and an operation button assembly attached to a back surface of the surface material and including a button corresponding to the button operation unit.

A base unit for a keyboard is presented. The base unit has a substantially rectangular layout. The base unit includes an equipment portion, formed so that it can be equipped with a plurality of key switches for the keyboard. The equipment portion is arranged on a first side of the base unit. The base unit further comprises at least one coupling portion for mechanically coupling the base unit to an accessory module for the keyboard. Each coupling portion includes a first coupling feature and a second coupling feature. The first coupling feature is arranged on the first side of the base unit, and the second coupling feature is arranged on a second side of the base unit facing away from the first side. Each coupling feature is arranged parallel to a long side of the base unit continuously between narrow sides of the base unit. The first coupling feature is formed for positive locking with a first mounting feature of the accessory module. The second coupling feature is formed for positive locking with a second mounting feature of the accessory module.

A base unit for a keyboard is presented. The base unit has a substantially rectangular layout. The base unit includes an equipment portion, formed so that it can be equipped with a plurality of key switches for the keyboard. The equipment portion is arranged on a first side of the base unit. The base unit further comprises at least one coupling portion for mechanically coupling the base unit to an accessory module for the keyboard. Each coupling portion includes a first coupling feature and a second coupling feature. The first coupling feature is arranged on the first side of the base unit, and the second coupling feature is arranged on a second side of the base unit facing away from the first side. Each coupling feature is arranged parallel to a long side of the base unit continuously between narrow sides of the base unit. The first coupling feature is formed for positive locking with a first mounting feature of the accessory module. The second coupling feature is formed for positive locking with a second mounting feature of the accessory module.

A key switch includes a baseplate, a circuit layer, a keycap and a support rod. The baseplate has a hook and a first through hole neighboring to the hook. The circuit layer includes a first sublayer disposed above the baseplate and having a second through hole, and a second sublayer disposed above the first sublayer and having a third through hole; a portion of the second sublayer extends over the second through hole and forms a first resilient portion; the first resilient portion has four sides, two of which connect to the second sublayer; and the first resilient portion is neighboring to the hook. The keycap is disposed above the baseplate and can move upward and downward in respect to the baseplate. The support rod has a first portion and a second portion; the first portion movably connects to the keycap and the second portion engages the hook.