Fastener comprising a snap-engagement foot to push through a hole in a panel and an engagement head configured to jut over said panel

A fastener, comprising:

• a snap-engagement foot configured to be pushed axially through a hole in a panel;
• and
• and an engagement head configured to jut over said panel when said snap-engagement foot is pushed into said hole, wherein
• the snap-engagement foot includes:
• a rigid core;
• and
• three curved flexible wings each connected to said rigid core at different angular locations on the core about an axis of the core, each said curved flexible wing having, opposite a face of said core, an inside surface bordered by a longitudinal edge of said wing and by a transverse edge of said wing,
• the snap-engagement foot includes a pointed end that is an opposite end to said engagement head, and each wing includes an outside surface tapering respectively towards:
• (i) the pointed end, and (ii) the transverse edge, on respective opposite sides of an inflection plane oriented transversely to the axial direction of said snap-engagement foot, the inflection plane being defined by respective inflection points of the respective outside surfaces, each of said curved flexible wings being configured to bend by elastic deformation towards said rigid core to enable the snap engagement of said foot into the hole when inserted therein, wherein
• said rigid core comprises a hub and three small walls extending radially from said hub,
• the respective inside surfaces of each said curved flexible wing being furthermore bordered respectively by the small walls which are remotely opposite the respective longitudinal edges of the respective wings.

A fastener, comprising:

• a snap-engagement foot configured to be pushed axially through a hole in a panel;
• and
• and an engagement head configured to jut over said panel when said snap-engagement foot is pushed into said hole, wherein
• the snap-engagement foot includes:
• a rigid core;
• and
• three curved flexible wings each connected to said rigid core at different locations on the core, each said curved flexible wing having, opposite a face of said core, an inside surface bordered by a longitudinal edge of said wing and by a transverse edge of said wing,
• the snap-engagement foot includes a pointed end that is an opposite end to said engagement head, and each wing includes an outside surface tapering respectively towards:
• (i) the pointed end, and (ii) the transverse edge, on respective opposite sides of an inflection plane oriented transversely to the axial direction of said snap-engagement foot, the inflection plane being defined by respective inflection points of the respective outside surfaces, each of said curved flexible wings being configured to bend by elastic deformation towards said rigid core to enable the snap engagement of said foot into the hole when inserted therein, wherein
• said rigid core comprises a hub and three small walls extending radially from said hub,
• the respective inside surfaces of each said curved flexible wing being furthermore bordered respectively by the small walls which are remotely opposite the respective longitudinal edges of the respective wings.