Patent ID: 8469168

Claim:
A synchronizing device for transmission comprising a clutch hub mounted on a shaft and a plurality of 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 placed in the clutch hub groove, and a clutch gear disposed coaxial to the shaft, the synchronizing device comprising: a blocker ring disposed to touch a cone portion formed on the clutch gear, a blocking key locking portion formed in the clutch hub for an upper external circumference of the blocking key to contact thereto; and a receiving portion formed on the blocker ring for supporting the blocking key; wherein the blocking key locking portion comprises: blocking key guide portions protruded from the clutch hub groove along radial direction for accommodating the blocking key; and blocking key catching portions extending from the blocking key guide portions along a longitudinal axis of the shaft for contacting upper side of the blocking key, wherein a width between the blocking key guide portions is larger than a width of the blocking key catching portions.