Cable brake, elevator car and elevator system

An elevator system including a cable brake and a brake cable, the cable brake having a pair of brake shoes with braking surfaces that face one another, the brake cable being fastened in an elevator shaft and being guided between the braking surfaces, a first of the brake shoes being movable between a braking position, in which the brake cable is pressed against the braking surface of a second of the brake shoes, and a release position, in which the brake cable is released between the brake shoes, the cable brake comprising:

• two rotatably mounted pivot arms each connected to the first brake shoe and being arranged as a parallelogram, one side of the parallelogram being oriented in parallel with a cable guidance direction of the brake cable;
• a releasable retaining device that applies a retaining force to the first brake shoe in the release position wherein the retaining force acts on one of the pivot arms;
• a reset device for switching the first brake shoe from the braking position to the release position;
• a housing in which the brake shoes, the pivot arms, the retaining device and the reset device are arranged, the housing being connected to an elevator car;
• wherein the elevator car is guided by hollow rails that are not compression-resistant enough to withstand elevator car braking forces;
• wherein at least one of the retaining device and the reset device is inactive during braking of the elevator when the brake shoes are in the braking position;
• and
• including at least two feed springs arranged in parallel that exert a force on the first brake shoe in a direction of the braking position, the feed springs being tension springs mounted rotatably about an axis arranged in parallel with rotational axes of the pivot arms.