Patent ID: 8459426

Claim:
A synchronizing device for a transmission having a clutch hub disposed to a shaft and a clutch hub groove formed thereto, a sleeve splined and connected to an external side of the clutch hub for being capable of moving along axial direction of the shaft, a blocking key disposed to the clutch hub groove, and a clutch gear disposed coaxial to the shaft, the synchronizing device comprising: a blocker ring disposed to slidably touch a cone portion formed to the clutch gear; wherein a blocking key receiving portion for supporting the blocking key is formed to the blocker ring; wherein the blocking key receiving portion comprises: support protrusions protrudingly formed in an axial direction of the shaft as a pair with a predetermined distance therebetween; and a receiving space formed between the support protrusions for supporting the blocking key; and wherein the blocking key receiving portion further comprises a protrude portion for guiding the blocking key receiving portion into the clutch hub groove.