Patent ID: 7258547

Claim:
A press-type bit-holding mechanism of a dental high-speed handset, comprising: a hollow rotary shaft formed with an axial receiving tunnel and having a first end section and a second end section opposite to the first end section, the first end being depressed to form an abutting section defining a hexagonal hole; a push button having a substantially annular first coupling section and a fixing section integrally connected with the first coupling section, the first coupling section defining a first coupling hole, the first coupling section being formed with two opposite splits in a direction distal from the fixing section, the first coupling section further having two first projecting posts opposite to each other, the first projecting posts and the splits being interlaced with each other, the fixing section being adjoined with a stop shoulder section, the push button being accommodated in the receiving tunnel of the hollow rotary shaft with the shoulder section abutting against the abutting section of the first end section, the fixing section having a hexagonal shape adapted to the hexagonal hole of the abutting section, the fixing section extending through the hexagonal hole out from the first end section, whereby the push button and the hollow rotary shaft cannot be rotated relative to each other; and a holder barrel accommodated in the receiving tunnel of the hollow rotary shaft, the holder barrel having a substantially annular second coupling section defining a second coupling hole, the second coupling section having two splits and two projecting posts complementary to the splits and the projecting posts of the first coupling section, the holder barrel having a frictional section adjacent to the second coupling section, the frictional section having a thickness larger than that of the second coupling section, the holder barrel further having a stop flange section distal from the second coupling section and adjacent to the frictional section, the flange section having a diameter larger than a diameter of the receiving tunnel of the hollow rotary shaft, the flange section abutting against the second end section of the hollow rotary shaft.