Bed, preferably hospital or care bed, comprising a lower frame (1), usually equipped with drive wheels, and an upper frame (2), on which a support surface for a mattress is mounted, and where the upper frame (2) is connected to the lower frame (1), such that the lower frame can be raised and lowered in relation to the lower frame by one or more adjustment means (5, 6) driven by an electric motor having a control unit (7) that can be activated with a control (8), and where the bed is equipped with a crush protection to prevent something from being crushed under the upper frame, said crush protection comprises a source of light on the upper side of the lower frame, which sends a light beam to a receiver connected to the control unit, and when the light beam is interrupted it sends a signal to the control unit to stop the m otor or motors, characterized in that the light source and the receiver are located in immediate mutual proximity, and because the light beam is sent over the entire perimeter, or essentially throughout the perimeter along the lower frame to the receiver.Cama, preferentemente cama de hospital o de cuidados, que comprende un armazón inferior (1), equipado habitualmente con ruedas de accionamiento, y un armazón superior (2), en el que está montada una superficie de soporte para un colchón, y donde el armazón superior (2) está conectado al armazón inferior (1), de tal modo que el armazón inferior puede ascender y descender en relación con el armazón inferior mediante uno o varios medios (5, 6) de ajuste impulsados por un motor eléctrico que tiene una unidad (7) de control que puede ser activada con un control (8), y donde la cama está equipada con una protección contra el aplastamiento para impedir que algo sea aplastado bajo el armazón superior, dicha protección contra el aplastamiento comprende una fuente de luz en el lado superior del armazón inferior, que envía un haz de luz a un receptor conectado a la unidad de control, y cuando el haz de luz es
