| 摘要 |
A hair styling iron comprises a handle to which a barrel is mounted, a heating element in the barrel; a rotary drive that rotates the barrel; a control circuit including a timer; and a momentary drive switch which is user actuable and connected to the control circuit for control of the motorised means. Actuation of the drive switch must be maintained by the user in order to operate the rotary drive. The control circuit monitors at least one change of state of the user-actuable drive switch to determine a starting time, and actuates an alarm after an elapsed time measured from the starting time. The elapsed time is calculated by the control circuit in direct proportion to the angle of rotation of the barrel relative to the handle that occurs between first actuation of the drive switch and release of the drive switch immediately following the first actuation of the drive switch. |
