Eta Sa Manufacture Horlogere Suisse

Roland Bitterli

Pierre-André Meister

Fabien Blondeau

André Zanetta

Wilfried Noell

Toralf Scharf

Assembly element () made in a plate of brittle material, including an aperture () provided for the axial insertion of an arbour (). The inner wall () of the aperture () includes elastic structures (), which are etched into the plate and which each include at least one support surface () for gripping the arbour () radially in order to secure the assembly element () relative to the arbour (). The assembly element () includes a first series (S) of elastic structures () etched in a top layer () of the plate and a second series (S) of elastic structures () etched in a bottom layer () of the plate. A timepiece may be fitted with this assembly element.

Assembly element including two series of elastic structures and timepiece fitted with the same

Assembly element made in a plate of brittle material, such as silicon, in particular for a timepiece, including an aperture provided for the axial insertion of an arbour, the inner wall of the aperture including elastic structures which are etched into the plate and which each include at least one support surface for gripping the arbour radially in order to secure the assembly element relative to the arbour. Each elastic structure is formed by a fork which is connected to the inner wall of the aperture by a bridge of material and which includes two branches extending, on either side of the bridge of material, generally towards the arbour. Each branch includes a support surface in proximity to the free end thereof. The invention also proposes a timepiece fitted with an assembly element of this type.

Assembly element including fork shaped elastic structures and timepiece including the same

Assembly element () made in a plate of brittle material, including an aperture () provided for the axial insertion of an arbour (), the inner wall () of the aperture () including elastic structures (), which are etched into the plate to grip the arbour () radially. Each elastic structure () includes a first rectilinear elastic strip (L) which extends along a tangential direction relative to the arbour (). According to the invention, each elastic structure () is formed by a radial stack of several parallel elastic strips.

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Neuchâtel, Switzerland

Roland Bitterli