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4-14. HEAD RELEASE MECHANISM BLOCK
The heat) release mechanism block consists of the frame unit
cam rack, molar side (/ate unit stepping motor, reteaso lover
and carriage gu>do plate unit
Here, the head release mechanism during printing operation and
the head release mocharMim manually operates by using the
release lever will be separated mto
2
and oxplainod below
4-14-1. Head Release Mechanism Block during
Printing Operation
The heoO release meehanhtm block during printing operation
consists of a cam. rack, motor side plate unit and a part o' the
lr$me unit
When the motor rotates in the printing column lowering
direction,
the cem drive gear -ol-t-> and the
rack which
coincides with it and also the cam which cam guide is bound to
the framo slide and Shift«" the direction of arrow os shown in the
diagram. Then the head release shaft which is caulked to the
carriage guide plate unit by the cam is thrust upward, and the
head is disengaged from tho platen
In cast) when performing pressure contact again, -oloaso the
lock of the rack hy applying power to the cam control solenoid
by Invtwsing the motor rototion. and tho rack and com arc shifted
in the opposite direction, and tha head is pressure contacted to
the platen by the prejsuro from the head pressure contacting
spring.
4-14-2. Manual Head Release Mechanism Block
The manual head release mechanism block consist* ot a rcloaoo
lever end carnage guide piate unit. When the knob located on
the upper section of the teleasa l"v«r t* operated, tho hoed
release shett which is caulked lo the carriage guide plate unit by
the cem section locatod on thn underside Of the relnnso kfver is
depressed, the heed is disengaged from the ploten. Moreover,
when the rolouse lever is operated further, tho small roller unit is
depressed by another cam located on the opposite sido of the
release lover, end the rubber ro»lw and the small (Oflei umt are
disengsocd Then the release lever is locked m this atstn The
release of the lock is performed by returning the release lever to
its original position
4-15. CARRIAGE DETECTION SIGNAL
GENERATING BLOCK
The carriage detection signal generating block consists of a
mechanical switch
HeoO
4 10
PRN-T24IAEI
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