Elastic module and elastic cushion

An elastic module, comprising:

• a plurality of middle rings, and
• a plurality of elastic units arranged on the plurality of middle rings in an array, wherein:
• each of the plurality of elastic units comprises a fixed end and a flexible end,
• the plurality of middle rings comprise a plurality of locking structures configured to be interlocked with the fixed end,
• the fixed end comprises a locking cooperation structure configured to be detachably matched with a corresponding one of the plurality of locking structures,
• each of the plurality of elastic units in a released state is configured to be placed on the plurality of middle rings in a first direction through an interlocked connection between the corresponding one of the plurality of locking structures and the locking cooperation structure, so that the flexible end is located away from the plurality of middle rings,
• each of the plurality of elastic units is configured to be placed on the plurality of middle rings in a second direction, so that a corresponding one of the plurality of elastic units is configured to be fixed in a compressed state through the interlocked connection between the corresponding one of the plurality of locking structures and the locking cooperation structure along a release direction of the corresponding one of the plurality of elastic units, and
• the first direction and the second direction are opposite directions.