US Patent 10272865 Arm rest

An arm rest attachable to a seat for a vehicle occupant to sit on includes side members, a front member, and a rear member. The side members include a pair of side members provided at left and right sides of the vehicle occupant and extending in a front-rear direction. The front member is in front of the vehicle occupant when the vehicle occupant is seated and is configured to couple front sides of the left and right side members to each other at least when in use. The rear member couples the seat to rear sides of the side members. The side members and the front member are rotatable about a line that connects left and right coupled points between the rear member and the seat.