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40930701TH DRAFT Vesion 49 /
2.6 Toner Low Detection
• Composition
The device consists of the stirring gear which rotates at a constant rate, the stirring bar and
the magnet on the stirring bar. The stirring bar rotates through the link on the protrusion in
the stirring gear.
Operation during toner full state
• The stirring bar rotates due to the interlocking
with the stirring gear.
• Even when the magnet on the stirring bar
reaches the maximum height, since the other
side is being dipped in the toner, the stirring
bar is pushed by the stirring gear.
Operation during toner low state
• When the stirring bar reaches the maximum
height, since there is no resistance provided
by the toner on the other side, it falls to the
minimum height due to its own weight. Be-
cause of this, the time interval during which it
is in encounter with the magnet of the sensor
lever becomes long. By monitoring this time
interval, toner low can be detected.
• Operation
Toner Low is detected by monitoring the time interval of the encounter of the magnet set on
the sensor lever and the magnet on the stirring bar.
Magnet
Protrusion
Stirring Bar Stirring Gear
Sensor Lever
Toner Sensor
Stirring Bar
Stirring Gear Section
Stirring Bar
Sensor Lever