| 摘要 |
<p>A keypad (10) for entering a complete set of alphanumeric characters (including symbols) into telephonic equipment comprises a housing (14) containing a telephone set compatible array (18) of manually operated actuator elements (20), each actuator element (20) selectably coding for four or more alphanumeric characters upon a single actuation of the element. The manually operated actuator elements (20) each comprises each comprises a push button assembly (24) and a switch assembly (28). The switch assembly (28) further comprises two or more switches (44). In a two-way switch assembly, the push button assembly is manually operable to selectably close either switch individually and both switches together. In a three-way switch, the push button assembly is manually operable to selectably close any one of the three switches individually. The push button assembly (24) includes a push button cover (30) that has an upper surface that serves as a user interface, which is configured to facilitate a user's operation of the actuator elements (keys) to selectively enter discrete alphanumeric selections into the keypad.</p> |
