No-tools chair and chair arm assembly

A chair, comprising:

• a seat;
• a backrest;
• a left armrest support connected to the seat cushion, the left armrest support having mating formations thereon;
• a right armrest support connected to the seat cushion, the right armrest support having mating formations thereon;
• a left backrest support connected to the backrest, the left backrest support pivotally connected to the left armrest support;
• a right backrest support connected to the backrest, the right backrest support pivotally connected to the right armrest support;
• a left chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the left armrest support;
• and
• a right chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the right armrest support;
• whereby the left chair arm and the right chair arm lock the left backrest support and right back rest support in position when coupled to the left armrest portion and right armrest portion, respectively.

A no-tools chair arm assembly, comprising:

• an armrest support configured and arranged to connect to a seat of a chair, the armrest support having mating formations thereon;
• and
• a chair arm having an armrest portion and support member depending from the armrest portion, a connector extending from the support member having reciprocal mating formations thereon configured and arranged to interlock with the mating formations on the armrest support;
• whereby the chair arm interfaces with the chair arm of the armrest portion.