Double lock design for polypropylene housing

A plastic arrangement comprising:

• a first plastic component,
• a second plastic component, and
• a plastic lock mechanism for fastening the second plastic component to the first plastic component,
• the plastic lock mechanism comprising:
• a first lock unit comprising:
• a U-shaped cantilever member being integrally connected to the second plastic component,
• a catch element being integrally connected to the U-shaped cantilever member, and
• a catch element retention part being integrally connected to the first plastic component, and
• a second lock unit comprising:
• a protruding member being integrally connected to the U-shaped cantilever member, the protruding member comprising a disc element, and
• a protruding member retention part being integrally connected to the first plastic component,
• wherein
• the plastic lock mechanism provides a released position and a locked position, wherein
• in the released position, the catch element is positioned in an unfastened position, wherein the catch element is positioned such that the catch element retention part does not block the catch element and the protruding member is positioned such that the protruding member retention part does not hold the protruding member for unfastening the second plastic component from the first plastic component,
• in the locked position, the catch element is positioned in a fastened position, wherein the catch element retention part blocks the catch element for fastening the second plastic component to the first plastic component,
• and the protruding member retention part holds the protruding member for keeping the catch element in the fastened position.