Thin electrical switch
View Patent ↗An electrical switch which includes a top metal support plate, a triggering member bearing on a bottom of a recess, a bottom metal contact plate having a fixed central contact region, and an adhesive fixing insulating sheet. The adhesive insulating sheet is arranged between a peripheral portion of the bottom face of the top support plate and a peripheral portion of the top face of the bottom contact plate and the adhesive insulating sheet adheres, by its two opposite faces, to each of said two annular portions to form a means for fixing the top support plate to the bottom contact plate.
1. An electrical switch comprising:
a top support plate produced from a metal plate, the top support plate cut and shaped to delimit a recess having an annular bottom and delimiting an open first central hole;
an electrically conducting triggering member having a convex shape and is elastically deformable from a stable rest position in a direction substantially perpendicular to a bottom of the recess, the triggering member comprising a bottom edge positioned to bear vertically downward on a facing top face of the annular bottom;
a bottom contact plate produced from a cut metal plate, the bottom contact plate comprising a fixed central contact region arranged facing both the first central hole and a conductive central portion of the bottom face of the triggering member such that, upon deformation of the electrically conducting triggering member, an electric pathway is established between the conductive central portion of the triggering member and the fixed central contact region of the bottom contact plate; and
an adhesive fixing insulating sheet comprising a second central hole;
wherein the insulating sheet is arranged vertically between a peripheral portion of the bottom face of the top support plate and a peripheral portion of the top face of the bottom contact plate; and
wherein the insulating sheet comprises two opposite faces configured to adhere to each of said two peripheral portions to form a means for fixing the top support plate to the bottom contact plate.
2. The electrical switch of claim 1 , further comprising an actuating member mounted in a movable manner relative to the top support plate in a direction substantially perpendicular to the bottom of the recess in order to act on the top face of the central portion of the triggering member.
3. The electrical switch of claim 1 , further comprising a solid top closing film comprising a bottom face, wherein the bottom face of the top closing film is configured to adhere to a peripheral region of the top face of the top support plate.
4. The electrical switch of claim 1 , wherein the fixed central contact region of the bottom contact plate comprises a part extending in a protruding manner offset vertically relative to the flat bottom face of the top support plate.
5. The electrical switch of claim 1 , wherein the triggering member comprises a spherical cap, and wherein the recess comprises a concave cylindrical shape such that a diameter of the circular bottom edge of the triggering member is received with a radial play in the concave recess.
6. The electrical switch of claim 1 , wherein the top support plate comprises at least one connection terminal comprising a cut and bent peripheral lead which extends vertically downward from the top support plate.