Brother XM3700 Service Manual page 14

Outline of Mechanism Driveline
(C) Movement of automatic 1-step BH mechanism
BH connecting
shaft
BH lever holder
BH lever
BH foot
BH connecting shaft
BH foot
BH change arm
BH stopper
BH change arm
BH lever holder
3
BH lever
BH cam
1 - 5
BH stopper
BHF finger
3
(A)
BHZ finger
BH cam
BHF finger
(B)
BHZ finger
Z finger frame