Modular seat bottom cushion, and seat assembly comprising such a cushion

A modular seat bottom cushion, configured to be attached to a seat structure having a seat bottom structure comprising two lateral flanges spaced apart by a front transverse tube and a rear transverse tube, the modular seat bottom cushion comprising, in the assembled state:

• a base, comprising a mechanical interface system for attachment to the seat bottom structure,
• a padding resting on an upper surface of the base,
• a covering which covers the padding, and wherein the mechanical interface system comprises:
• a rear mechanical interface on a rear part of the base, comprising a first open recess, configured to house the rear tube, pivotably around the rear tube,
• a front mechanical interface, on a front part of the base, comprising a second open recess, configured to house the front tube in a mechanically lockable manner via a locking system of the front mechanical interface,
• and wherein the mechanical interface system is configured to allow the attachment of the modular seat bottom cushion by the following steps:
• /A/ placing the rear mechanical interface opposite the rear tube and inserting the rear tube into the first recess, and
• /B/ pivoting the modular cushion around the rear tube then fitted into the first U-shaped recess of the rear mechanical interface until the front tube is inserted into the second recess of the front mechanical interface and mechanically locking the front tube in the second recess via the system for locking the front mechanical interface.