| 摘要 |
A rotatable multi-key is provided to improve convenience in using a product by rapidly selecting keys for performing a menu function and an operation mode function of a terminal. A rotatable multi-key(A) includes a base(10), a substrate(20), a dome sheet(30), a holder(40), a wheel key(50) and a rotation washer(70). A receiving unit is provided in the base. A receiving space for each component is provided in the base. An insertion hole(12) with a cut part is formed on one end of the base so that a connection unit(21) provided on the substrate is exposed to the outside. The substrate is connected to a main PCB(Printed Circuit Board) mounted in various mobile phones to transmit signals inputted through the multi-key to the main PCBs of the mobile phones. A circuit pattern for sensing the operation of the multi-key and a plurality of contact parts having a predetermined array form are provided on a surface of the substrate. The dome sheet has a plurality of metal domes corresponding to the contact part and is attached to the substrate. The holder with a plurality of pressing protrusions corresponding to the metal dome is installed on an upper part of the dome sheet. The wheel key is installed on the upper part of the holder and includes a reflector which generates a signal and is connected to a rotation sensor. The position fixing member is used to performing a stopping at an accurate position by a stroke of the elastic member when the wheel key rotates.
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