Inclined Case Head Fixing for Compact Liquid Ejecting Apparatus
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Solution Overview
Problem
The existing liquid ejecting apparatuses face a challenge in maintaining image quality due to the need to position the transport unit far from the nozzle plate to avoid interference with the bolts, leading to increased distance and transport errors.
Innovation Solution
The liquid ejecting apparatus incorporates a case head with inclined surfaces on its fixing portions, allowing for a more compact design that enables the transport unit to be positioned closer to the nozzle plate without increasing the size of the apparatus, by using inclined surfaces on the first and second fixing portions to create space for the transport rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the transport unit is disposed at a position further away from the nozzle plate to avoid interference with the bolt, then the bolt interference is prevented, but the distance between the nozzle plate and the transport unit becomes long, causing image quality deterioration due to transport error
Solution Approach 1:
The patent repositions the transport unit from a location in the main scanning direction (away from the nozzle plate) to a location in the sub-scanning direction (near the nozzle plate). This dimensional change allows the transport unit to be disposed close to the nozzle plate without interfering with the bolt, thereby reducing transport error while avoiding bolt interference
Solution Approach 2:
The patent employs an inclined surface on the case head that allows for adjustable positioning of the transport unit. The inclined surface enables the transport unit to be positioned at an optimal location near the nozzle plate while maintaining proper clearance from the bolt, providing dynamic adaptability in the positioning
2Manufacturing precision
If the transport unit is positioned closer to the nozzle plate, then the distance is shortened and image quality is improved, but the bolt may interfere with the transport unit
Solution Approach 1:
The patent positions the transport unit in the sub-scanning direction near the nozzle plate, utilizing a different spatial dimension. This allows the transport unit to be close to the nozzle plate for improved image quality while the inclined surface and repositioning ensure the bolt does not interfere with the transport unit's operation
3Volume of moving object
If the apparatus size is reduced to make it more compact, then the overall dimensions are decreased, but there is insufficient space to accommodate both the bolt and transport unit
Solution Approach 1:
The patent utilizes the sub-scanning direction for positioning the transport unit, effectively using three-dimensional space more efficiently. This allows the apparatus to be more compact while still accommodating both the bolt and transport unit without interference, as they are positioned in different spatial dimensions
Solution Approach 2:
The inclined surface on the case head provides dynamic positioning capability, allowing the transport unit to be adjusted to an optimal position that accommodates both the bolt and the compact apparatus size. This dynamic adjustment enables efficient space utilization
Data Source
AI summary
The liquid ejecting apparatus includes a liquid ejecting head ejecting liquid in a first-direction and a transport unit transporting a medium in either a second-direction or a third-direction, in which the liquid ejecting head includes a nozzle plate, a case head provided in a fourth-direction with respect to the nozzle plate and having a support surface on the fourth-direction-side thereof, a circuit substrate supported on the support surface, a holder provided in the fourth-direction with respect to the circuit substrate, and a first-screw fixing the case head and the holder, the case head includes a case main body having a first-side-surface on the second-direction-side thereof and a first-fixing-portion provided in the second-direction with respect to the first-side-surface and provided with a first-screw-hole, and the first-fixing-portion includes a first-opening-surface, and a first-inclined-surface provided between the first-side-surface and the first-opening-surface and inclined with respect to a surface perpendicular to the first-direction.