| 摘要 |
Disclosed is a photoelectric keyboard button, comprising: a circuit board (1) for providing a circuit connection, a mounting hole (11) being provided on the circuit board; an optocoupler assembly (2) provided on the circuit board and comprising a transmitting element (21) and a receiving element (22) provided on a side of the mounting hole; a button base (3), which is mounted into the mounting hole and is opened from the top to the bottom to form a guide basket (31), wherein a light passing groove (32) is provided on the guide basket for allowing the transmitting element and the receiving element to form a light passage; a pressing shaft (4), which is mounted into the guide basket and can slide up and down along the guide basket; and a hammer (5) vertically provided inside the guide basket, wherein the two ends thereof are respectively connected to the pressing shaft and the guide basket via springs (6, 7), a shifting block (51) connected to the pressing shaft is provided on a side surface of the hammer, and the hammer is provided with a light pathway switch (52). When being pressed down or bouncing up, the pressing shaft pushes the hammer to rotate horizontally and reciprocally via the shifting block, so as to rotate the light pathway switch to respectively switch on or off the light passage between the transmitting element and the receiving element. The photoelectric keyboard button can present an evident feeling for the difference between pressing and touching operations and a key press sound, has a higher coupling efficiency, and does not easily gather dust. |
