A lock device for installation in an access member movable relative to a frame , the lock device comprising: - a bolt movable between a retracted position for disengagement from a strike plate in the frame , and an extended position for engagement with the strike plate ; - a bolt force device arranged to force the bolt from the retracted position towards the extended position ; - a blocking member movable between a blocking position where movement of the bolt from the retracted position towards the extended position is blocked by the blocking member , and an unblocking position where movement of the bolt from the retracted position towards the extended position is not blocked by the blocking member ; - a lock device magnet movable between a passive position and an active position in response to a repulsive magnetic force acting on the lock device magnet ; and - a release transmission arranged to mechanically transmit a movement of the lock device magnet from the passive position to the active position , to a movement of the blocking member from the blocking position to the unblocking position ; wherein the release transmission comprises a knee joint having a knee joint pivot , and a first link member and a second link member interconnected via the knee joint pivot ; wherein the lock device magnet is arranged to act on the knee joint such that movement of the lock device magnet from the passive position to the active position causes a movement of the knee joint pivot ; wherein the lock device further comprises a blocking member pivot ; and wherein the blocking member is rotatably connected to the blocking member pivot for rotation between the blocking position and the unblocking position . - a bolt movable between a retracted position for disengagement from a strike plate in the frame , and an extended position for engagement with the strike plate ; - a bolt force device arranged to force the bolt from the retracted position towards the extended position ; - a blocking member movable between a blocking position where movement of the bolt from the retracted position towards the extended position is blocked by the blocking member , and an unblocking position where movement of the bolt from the retracted position towards the extended position is not blocked by the blocking member ; - a lock device magnet movable between a passive position and an active position in response to a repulsive magnetic force acting on the lock device magnet ; and - a release transmission arranged to mechanically transmit a movement of the lock device magnet from the passive position to the active position , to a movement of the blocking member from the blocking position to the unblocking position ; wherein the release transmission comprises a knee joint having a knee joint pivot , and a first link member and a second link member interconnected via the knee joint pivot ; wherein the lock device magnet is arranged to act on the knee joint such that movement of the lock device magnet from the passive position to the active position causes a movement of the knee joint pivot ; wherein the lock device further comprises a blocking member pivot ; and wherein the blocking member is rotatably connected to the blocking member pivot for rotation between the blocking position and the unblocking position . <EOS>