Pulley fixing apparatus of image forming apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorKarp-sik Youn
Life of this patent
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Abstract
A pulley fixing apparatus of an office machine having a pulley fixing part rotatably fixing a driven pulley on a frame, a sliding part movably supporting the pulley fixing part on the frame, and an automatic tension adjusting part elastically urging the pulley fixing part in a direction such that the driven pulley imparts a predetermined tension to a power-transmitting belt. The pulley fixing apparatus readily enables mounting and dismounting of the power-transmitting belt and the driven pulley and control of the power-transmitting belt tension by simplifying structure and assembly. Further, the pulley fixing apparatus reduces manufacturing cost and assembly time by decreasing the number of parts.
Claims23
A pulley fixing apparatus for an image forming apparatus including a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the pulley fixing apparatus comprising:
- a pulley fixing part rotatably fixing a driven pulley on the frame;
- a sliding part movably supporting the pulley fixing part on the frame;
- and
- an automatic tension adjusting part including an elastic pulling spring disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt, wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged between the first fixing portion and the driven pulley;
- and
- the elastic pulling spring has one end fixed at the first fixing portion and another end fixed at the second fixing portion to push the driven pulley outwardly from the second fixing portion of the frames,
- wherein:
- the sliding part comprises a slide protrusion positioned at the pulley fixing part;
- and
- the frame has an L-shaped protrusion guide hole positioned to support, receive and guide a projection of the slide protrusion.
A pulley fixing apparatus for an image forming apparatus including a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the pulley fixing apparatus comprising:
- a pulley fixing part rotatably fixing a driven pulley on the frame;
- a sliding part movably supporting the pulley fixing part on the frame;
- and
- an automatic tension adjusting part including an elastic pulling spring disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt and an anti-release portion to prevent the pulley fixing part from being released from the frame by an external force of predetermined magnitude, wherein the anti-release portion comprises a second hook having a width that is greater than a width of the penetrated hole, and wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged between the first fixing portion and the driven pulley;
- and
- the elastic pulling spring has one end fixed at the first fixing portion and another end fixed at the second fixing portion to push the driven pulley outwardly from the second fixing portion of the frame.
An image forming apparatus having a pulley fixing apparatus, wherein the pulley fixing apparatus includes a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the image forming apparatus comprising:
- the pulley fixing apparatus, wherein the pulley fixing apparatus further comprises:
- a pulley fixing part rotatably fixing a driven pulley on the frame;
- a sliding part movably supporting the pulley fixing part on the frame;
- and
- an automatic tension adjusting part including an elastic pulling spring disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt wherein said driven pulley is pushed from an inside of said belt when the spring is in tension, wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged to push the driven pulley outwardly from the first fixing portion of the pulley fixing part;
- and
- the automatic tension adjusting part comprises an elastic spring having one end fixed at the first fixing portion and another end fixed at the second fixing portion,
- wherein the image forming apparatus is an inkjet printer, and wherein:
- the power-transmitting belt comprises a power-transmitting belt transmitting a driving force to a feed roller in the inkjet printer;
- the driving motor comprises a feed roller driving motor in the inkjet printer;
- and
- the driven pulley comprises a power-transmitting pulley, transmitting the driving force of the feed roller driving motor through the power-transmitting belt.
An image forming apparatus having a pulley fixing apparatus, wherein the pulley fixing apparatus includes a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the image forming apparatus comprising:
- the pulley fixing apparatus, wherein the pulley fixing apparatus further comprises:
- a pulley fixing part rotatably fixing a driven pulley on the frame;
- a sliding part movably supporting the pulley fixing part on the frame;
- and
- an automatic tension adjusting part including an elastic pulling spring disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt wherein said driven pulley is pushed from an inside of said belt when the spring is in tension, wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged to push the driven pulley outwardly from the first fixing portion of the pulley fixing part;
- and
- the automatic tension adjusting part comprises an elastic spring having one end fixed at the first fixing portion and another end fixed at the second fixing portion,
- wherein the image forming apparatus is an inkjet printer, and wherein:
- the power-transmitting belt comprises a carrier belt transmitting a driving force to a print head of the inkjet printer;
- the driving motor comprises a carrier driving motor of the inkjet printer;
- and
- the driven pulley transmits the driving force of the carrier driving motor through the carrier transfer belt.
A pulley fixing apparatus for an image forming apparatus including a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the pulley fixing apparatus comprising:
- a pulley fixing part rotatably fixing a driven pulley on the frame;
- a sliding part movably supporting the pulley fixing part on the frame;
- an automatic tension adjusting part disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt;
- and
- a locking part to lock the pulley fixing part after the tension of the power-transmitting belt installed on the driven pulley is adjusted, wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged between the first fixing portion and the driven pulley;
- and
- the automatic tension adjusting part comprises an elastic spring having one end fixed at the first fixing portion and another end fixed at the second fixing portion to push the driven pulley outwardly from the second fixing portion of the frame,
- wherein:
- the sliding part comprises a slide protrusion positioned at the pulley fixing part;
- and
- the frame has an L-shaped protrusion guide hole positioned to support, receive and guide a projection of the slide protrusion.
A subassembly of an image forming apparatus including a frame, a driving motor, and a power-transmitting belt driven by the driving motor and a driving pulley, the subassembly comprising:
- a pulley fixing part slidably fixing a driven pulley on the frame that imparts a tension to the power-transmitting belt by the driven pulley pushing from an inside of the belt when a spring disposed between the pulley fixing part and the frame is in tension, wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged between the first fixing portion and the driven pulley;
- and
- the spring has one end fixed at the first fixing portion and another end fixed at the second fixing portion to push the driven pulley outwardly from the second fixing portion of the frame,
- wherein:
- a sliding part comprises a slide protrusion positioned at the pulley fixing part;
- and
- the frame has an L-shaped protrusion guide hole positioned to support, receive and guide a projection of the slide protrusion.
A pulley fixing apparatus for an image forming apparatus including a frame, a driving motor, a power-transmitting belt driven by the driving motor and a driving pulley, the pulley fixing apparatus comprising:
- an assembly positioned inside the belt and comprising:
- a pulley fixing part rotatably fixing a driven pulley on the frame;
- a sliding part movably supporting the pulley fixing part on the frame;
- and
- an automatic tension adjusting part disposed between the pulley fixing part and the frame to elastically bias the pulley fixing part in a first direction and impart a predetermined tension to the power-transmitting belt when a spring disposed between the pulley fixing part and the frame is in tension, wherein:
- the pulley fixing part comprises a first fixing portion;
- the frame comprises a second fixing portion arranged between the first fixing portion and the driven pulley;
- and
- the spring has one end fixed at the first fixing portion and another end fixed at the second fixing portion to push the driven pulley outwardly from the second fixing portion of the frame,
- wherein:
- the sliding part comprises a slide protrusion positioned at the pulley fixing part;
- and
- the frame has an L-shaped protrusion guide hole positioned to support, receive and guide a projection of the slide protrusion.
Dependencies are inferred from the claim text.