Electronic device and dock

An electronic device, comprising:

• a first body;
• an insertion connector for connecting the first body;
• a second body connected to the insertion connector and physically connected/disconnected to/from the first body via the insertion connector by inserting the first body into the insertion connector or pulling the first body out of the insertion connector;
• a lock means having a locked state and an unlocked state, wherein the first body is securely connected to the insertion connector and cannot be physically pulled out of and disconnected from the insertion connector when the lock means is in the locked state, and wherein the first body is insecurely connected to the insertion connecter and can be physically pulled out of and disconnected from the insertion connector when the lock means is in the unlocked state;
• and
• a rotation means physically connected to the lock means,
• wherein when the first body is connected to the second body via the insertion connector,
• the lock means is in the locked state in a case where the first body is rotated to a first rotation range with respect to the second body via the rotation means,
• the lock means is in the unlocked state in a case where the first body is rotated from the first rotation range to a second rotation range with respect to the second body via the rotation means, and
• the lock means is in the locked state in a case where the first body is rotated from the second rotation range to a third rotation range with respect to the second body via the rotation means.