Patent ID: 6729221
Filing Date: 2004-05-04
Classification: B23D,Y10T

Abstract:
A scroll saw comprising;a work platform having a top side extending and defining a center line in a longitudinal direction and formed with a blade slot transverse to the longitudinal direction; a C-shaped frame having upper and lower frame portions disposed above and below said top side of said work platform, respectively; a blade unit passing through said blade slot in said work platform and having upper and lower blade ends; a blade holder unit including upper and lower blade holder arms respectively extending above and below said top side of said work platform, and connected to a respective one of said upper and lower blade ends and to a respective one of said upper and lower frame portions; a motor unit mounted on said work platform; a transmission unit interconnecting said motor unit and said blade holder unit to drive said blade holder unit for moving said blade unit to reciprocate relative to said work platform; a pivot unit for mounting pivotally said C-shaped frame on said work platform about a pivot axis parallel to the center line, thereby permitting sawing angle adjustment; and a locking unit for locking releasable said C-shaped frame to said work platform so as to arrest pivoting movement of said C-shaped frame relative to said work platform, thereby permitting retention of said C-shaped frame at a desired sawing angle; wherein said work platform includes a top plate formed with said top side, and a pair of lateral plates spaced apart in the transverse direction and extending downwardly from and cooperating with said top plate to form a mounting space thereamong, said lower frame portion and said lower blade holder arm extending into said mounting space; wherein said C-shaped frame is formed with a pivot hole between said upper and lower frame portions, and said lower frame portion is provided with a pivot sleeve unit aligned with said pivot hole along the pivot axis; said pivot unit including first and second pivot pin units mounted on a bottom side of said top plate, said first and second pivot pin units being aligned in the longitudinal direction and being spaced apart from each other in the longitudinal direction, said pivot hole in said C-shaped frame pivotally engaging said first pivot pin unit, said pivot sleeve unit on said lower frame portion pivotally engaging said second pivot pin unit.