Patent ID: 8053690

Claim:
An automotive brake light switch apparatus mounted on a brake booster, which includes a housing defining therein a constant pressure chamber and a variable pressure chamber partitioned by a diaphragm, with a first through-hole formed in the housing so as to fluid-communicate the outside and the variable pressure chamber, a second through-hole formed in the diaphragm so as to fluid-communicate the variable pressure chamber and the constant pressure chamber, and an air intake valve having a vacuum channel therein to allow the constant pressure chamber to selectively communicate with the variable pressure chamber, wherein the air intake valve is fitted into the second through-hole of the diaphragm and is configured to selectively open or close the first through-hole of the housing in response to operation of a brake pedal, the brake light switch apparatus comprising: a switch body including a switch; a switch rod slidably mounted to the switch body so as to turn on/off the switch of the switch body, wherein a protruding length of the switch rod is configured to be changeable by operation of the air intake valve; and a coupling portion formed on the switch body and coupling the switch body to the housing through the first through-hole.