Key module

A key module, comprising:

• a bottom plate, having a first surface and a second surface opposite to each other;
• a circuit layer having a first opening, disposed on the first surface of the bottom plate;
• a key cap, disposed above the circuit layer;
• a supporting structure, disposed between the bottom plate and the key cap;
• a touch member, disposed at the key cap, wherein the touch member is a capacitive touch member configured to sense finger movement direction and clicking;
• a backlight assembly disposed below the second surface of the bottom plate, wherein the backlight assembly comprises a circuit board, a light source disposed on the circuit board, a light guide plate and a reflection plate;
• and
• a flexible circuit board, electrically connected to the touch member, passing through the first opening of the circuit layer to extend next to the second surface of the bottom plate, wherein a portion of the flexible circuit board located between the key cap and the bottom plate is bent when the key cap moves downward relative to the bottom plat;
• wherein the light guide plate is located between the circuit board and the reflection plate, the light source is disposed on a surface of the circuit board facing the light guide plate, the circuit board comprises a second hole covered by the key cap, and the light emitted by the light source passes through the second hole, and the first hole after being reflected by the reflection plate.