Closure device for securing an electronic device on a holding device

A closure device for securing an electronic device on a holding device, comprising:

• a first closure part having a first attaching part,
• a second closure part having a second attaching part and which can be attached to the first closure part in a closing direction, wherein at least one thread is arranged on one of the attaching parts and at least one engaging element is arranged on the other of the attaching parts for running onto the at least one thread when attaching the closure parts to one another, and
• a magnetic device that acts in a magnetically attracting manner between the first closure part and the second closure part during the attaching process, wherein the at least one thread has a pitch such that, when attaching the closure parts to one another, as a result of the magnetically attractive effect of the magnetic device, the at least one thread and the at least one engaging element run onto one another, and the closure parts are thereby automatically twisted in relation to one another in a rotational direction about the closing direction,
• wherein, in a connected state in which the closure parts are set on each other, the closure parts are mechanically interlocked to resist a twisting against the rotational direction.