Print Head Handle Structure for Nozzle Plate Protection
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Solution Overview
Problem
Contemporary print heads are heavy and prone to accidental contact with external components during handling, leading to potential damage and inaccurate ink droplet discharge.
Innovation Solution
A print head design featuring a handle with greater strength than the housing, aligned opposite the nozzle plate, allowing stable attachment and detachment, reducing the risk of accidental contact and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the print head is made heavy to place ink droplets at accurate locations, then positioning precision is improved, but handling stability deteriorates and accidental contact with external components increases
Solution Approach 1:
The print head is divided into functionally independent segments: the housing containing the nozzle plate for precise ink discharge, and the separate handle for handling. This segmentation allows the heavy housing to maintain positioning precision while the handle provides ergonomic grip and handling stability, resolving the contradiction between weight for accuracy and ease of operation.
Solution Approach 2:
The handle acts as an intermediary element between the user's hand and the heavy print head housing. By providing a dedicated handling interface with greater strength than the housing, the handle mediates the transfer of force, enabling stable handling of the heavy device without risking damage to the fragile nozzle plate or housing.
2Ease of operation
If the handle strength is increased to enable stable handling of heavy print head, then handling stability is improved, but device complexity increases
Solution Approach 1:
The handle is designed as a separate, structurally simple component distinct from the housing. This segmentation allows the handle to be optimized for strength and ergonomics independently, providing handling stability without adding complex mechanisms to the overall device. The simple additive structure of handle plus housing minimizes overall complexity.
Solution Approach 2:
The handle is designed with locally enhanced strength properties only where needed for handling, rather than making the entire print head structure more complex. The handle's cross-sectional area and material properties are optimized specifically for withstanding handling forces, while the housing maintains its original design for ink discharge functionality, thus improving handling stability without proportionally increasing overall device complexity.
Data Source
AI summary
A print head that discharges a liquid includes: a nozzle plate in which a nozzle aperture through which the liquid is to be discharged in an ejection direction is formed, the nozzle plate being mounted on a liquid ejection surface; a housing that accommodates at least a portion of the nozzle plate; and a handle positioned opposite the nozzle plate in the ejection direction. The handle has a greater strength than that of the housing. At least a portion of the handle is aligned with the nozzle plate in a normal direction of the nozzle plate.