Our chairs are folded via an easy to use gas strut.  However, this is only to be used by trained personnel.  It is not possible for members of the public to close the system, either on purpose or accidently.  The seats need to fold down onto the platform so that they can be stored within the platform when closed. Our mechanisms are all covered with a security / safety cover to ensure no damage to fingers or clothing when the seats are opening and closing.