Padlock for securing a switch

A lockout padlock configured for securing a switch of an industrial plant, the lockout padlock comprising:

• a lock housing composed of plastic;
• a hoop displaceably held at the lock housing;
• a lock cylinder arranged in the lock housing and comprising a cylinder housing and a cylinder core rotatable about a cylinder axis in the cylinder housing;
• and
• a key,
• wherein the cylinder core is rotatable by means of the key between a locked position in which the hoop is locked or lockable to the lock housing and an unlocked position in which the hoop is released for an opening movement relative to the lock housing,
• wherein the lock cylinder comprises a plurality of tumblers, with each tumbler being movable relative to the cylinder housing between a respective release position in which the tumbler releases the cylinder core for a rotation into its unlocked position and a respective blocking position in which the tumbler blocks the cylinder core in its locked position relative to the cylinder housing,
• wherein the plurality of tumblers comprise a plurality of pin tumblers that are spring-loaded in the direction of their respective blocking positions,
• wherein the plurality of tumblers furthermore comprise a plurality of supplementary tumblers that are not spring-loaded and are freely movably supported between their respective release position and their respective blocking position, and
• wherein the plurality of pin tumblers and the plurality of supplementary tumblers are configured to have different kinematic behaviors so that unintentional movement of the plurality of pin tumblers and the plurality of supplementary tumblers to the respective release positions, caused by vibration of the lockout padlock by the industrial plant, is prevented.