초록 ▼

The present invention relates to a device forming a panel for a keyboard and/or push-buttons mounted for instance on the instrument board of an airplane and which is removably mounted on a wall and front face plate, the plate assembly being constituted by two sub-assemblies, for example a lower and

The present invention relates to a device forming a panel for a keyboard and/or push-buttons mounted for instance on the instrument board of an airplane and which is removably mounted on a wall and front face plate, the plate assembly being constituted by two sub-assemblies, for example a lower and an upper assembly removably assembled together.

대표청구항 ▼

A keyboard switch assembly adapted to be removably mounted on a wall of a vehicle dashboard or of another apparatus, said assembly comprising: a front face plate; an assembly of plates removably mounted under the front face plate, said plate assembly including a printed circuit board having electric

A keyboard switch assembly adapted to be removably mounted on a wall of a vehicle dashboard or of another apparatus, said assembly comprising: a front face plate; an assembly of plates removably mounted under the front face plate, said plate assembly including a printed circuit board having electric contact thereon; a plurality of resiliently deformable contact members, each having a concave portion connected to supporting length of said contact member on said circuit board; a plurality of depressable keys projecting through said front face plate, each depressable key including a body portion positioned in a recess in said front face plate and a plunger having an elongated portion axially slidable within a chamber of said body portion and a bulging-shaped head adjacent to said concave portion of said contact member, said head having a flat surface on which bears one end of a compression spring surrounding said plunger, the other end of said spring resting in a cavity in said body portion; each of said keys being depressable to deflect via said bulging-shaped head a respective contact member to establish an electrical contact between contacts on said circuit board; wherein said plate assembly comprises a lower sub-assembly and an upper sub-assembly removably assembled to each other, said lower sub-assembly including three plates jointly assembled to each other and constituted by said printed circuit board interposed between an insulating plate provided with an orifice for accommodating said contact member on said circuit board and a thickness plate adapted to be situated contiguous to the wall of said apparatus, said upper sub-assembly including a resilient membrane secured under a membrane-carrying plate having an aperture through which said contact member projects, said resilient membrane contacting and covering the concave portion of said contact member so as to removably maintain it in the orifice of said insulating plate.