A joystick switch assembly including a housing with an open-top covered with a cover shell, a stick extended out of the cover shell and having a contact plate at the bottom received within the housing, a membrane circuit mounted around the stick and disposed between the cover shell and the contact plate...http://www.google.com.tw/patents/US5488206?utm_source=gb-gplus-share專利 US5488206 - Joystick switch assembly
