Lock for locking multiple objects

A cable lock for locking multiple objects, comprising:

• a housing, having two ring-shaped walls positioned opposite from each other and spaced apart, an inner portion enclosed by the two ring-shaped walls, a ring-shaped groove and a ring-shaped slot both formed between the two ring-shaped walls and both surrounding the inner portion, and an opening formed in one of the ring-shaped walls, wherein the ring-shaped groove and the ring-shaped slot communicate with each other, the ring-shaped slot surrounds the ring-shaped groove and communicates with the outside, the width of the ring-shaped groove is greater than the ring-shaped slot, both the ring-shaped slot and the opening communicates with the ring-shaped groove, and the opening communicates with the outside;
• and
• at least one cables, having two end portions, wherein each end portion includes a neck section and a head section connected to the neck section, the neck section is located within the ring-shaped slot and capable of moving along the ring-shaped slot, the head section is located within the ring-shaped groove and capable of moving along the ring-shaped groove, the outer diameter of the neck section is smaller than the head section and smaller than the width of the ring-shaped slot, the outer diameter of the head section is smaller than the width of the ring-shaped groove, and the outer diameter of the head section is greater than the width of the ring-shaped slot but smaller than the width of the opening;
• a block, disposed on the housing and positioned to block the opening in a blocking position, wherein the block is further configured to be movable away from or returned to the blocking position;
• and
• a locking unit, disposed on the inner portion of the housing, capable of being operated into a locked state and an unlocked state, wherein in the locked state, the locking unit prevents the block from being moved away from the blocking position, and in the unlocked state, the locking unit allows the block to be moved away from the blocking position.